CN1389986A - Transmitting/receiving apparatus of regulating gain of transmitting/receiving signal, and method thereof - Google Patents
Transmitting/receiving apparatus of regulating gain of transmitting/receiving signal, and method thereof Download PDFInfo
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- CN1389986A CN1389986A CN01145189A CN01145189A CN1389986A CN 1389986 A CN1389986 A CN 1389986A CN 01145189 A CN01145189 A CN 01145189A CN 01145189 A CN01145189 A CN 01145189A CN 1389986 A CN1389986 A CN 1389986A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H03F2203/7236—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers by (a ) switch(es)
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/72—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal
- H03F2203/7239—Indexing scheme relating to gated amplifiers, i.e. amplifiers which are rendered operative or inoperative by means of a control signal the gated amplifier being switched on or off by putting into parallel or not, by choosing between amplifiers and shunting lines by one or more switch(es)
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
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Abstract
A transmitting apparatus which can suppress unnecessary power consumption. An optimal signal line is selected from a plurality of signal lines (53-56) having different gains provided by respective signal amplifying devices to perform gain adjustment on a signal to be transmitted, which is supplied to an input terminal (58), so as to optimize power consumption of each signal amplifying device in accordance with a gain value, and to halt the operation of the signal amplifying device on a signal line which is not selected.
Description
The present invention relates to a kind of transmitting apparatus and adjust the method for the signal gain that will be sent out, and a kind of receiving equipment and the method for adjusting gain of received signal, more particularly, the present invention is applicable to the mobile radio communications system as cell phone etc.
Usually, in this mobile radio communications system, between portable terminal and base station, communicate through interconnective wireless channel.In such mobile radio communications system, because the communication distance between this portable terminal and this base station is changing and influence that transmission channel declines etc., this signal level is always in change.
For this reason, mobile radio station has a gain adjustment circuit as amplifier and attenuator, so that this gain adjustment circuit cushions the level part that rises and falls in the signal that is received, so demodulator has been provided the received signal with the constant level of being adjusted into.The transmitter side of this portable terminal also has a gain adjustment circuit that the signal that will be sent out is transferred to the desired signal level, so that provide constant signal level to the base station.
In this mode, portable terminal generally has any gain adjustment circuit that is used to send and receive the two, so that avoid the influence of level fluctuation.As a result, be different for this system of the desired gain adjustment of gain adjustment circuit width with other system.
If the desired gain of system is adjusted width and is spread over 80 to 90[dB] scope in, from the viewpoint of technology, only realize it being very difficult with a gain adjustment circuit, this is owing to the isolation of device and the reason of dynamic range.Even be possible technically, and consider manufacturing expense, this also almost is irrealizable.
For fear of this problem, general as shown in Figure 1, the gain adjustment circuit that is used to send in the transmitter circuitry 1 of portable terminal is divided into a plurality of parts.For example, if whole system requires 80[dB] the gain adjustment, 80[dB then] level change and must on transmitting antenna 2, realize.Therefore, adjust 50[dB by intermediate frequency (IF)], and adjust remaining 30[dB by radio frequency [RF]].
More particularly, the IF signal S1 with constant level that sends into from input 3 is input to one first variable gain amplifier 5 through IF holding wire 4, and IF signal S1 is adjusted 50[dB therein] gain of width.Then IF signal S1 is imported into frequency mixer 6, and intermediate-freuqncy signal S1 utilizes the frequency of local signal S2 to carry out conversion therein, so that change RF signal S3 into.RF signal S3 is transfused to second variable gain amplifier 8 after by the band pass filter (BPF) 7 that is used to remove unnecessary frequency content, and RF signal S3 is adjusted 30[dB there] gain of width.At last, the RF signal S3 that gain is adjusted carries out constant signal by power amplifier 9 and amplifies (for example about 20[dB]), is imported into the band pass filter 11 that is used to remove unnecessary frequency content through RF holding wire 10 then.Have the RF signal S3 that has removed unnecessary composition and be added to transmitting antenna 2 at last, require the signal to be sent of power as having.
In aforesaid transmitter circuitry 1, because gain adjustment is divided into two-stage, so the signal level variation from input (3) to output (2) can be limited in maximum 50[dB].In addition, because this has caused the less difference between the minimum and maximum signal level of each unit tie point, so the dynamic range of each unit can reduce.As a result, transmitter circuitry 1 can provide a wide dynamic range as a whole, and has limited the dynamic range of each unit.
As another kind of trend in recent years, mobile radio communications system has utilized the frequency band of broad along with the increase of number of communication channels.Therefore in this case, if band pass filter as shown in Figure 17,11st is made of single unit, this can cause inconvenience, and for example the volume of filter is very big, produce big electrical loss (in other words, desired characteristic can not satisfy) or the like at passband.
For fear of these inconvenience, usually, the passband of broadband band pass filter is divided into a plurality of scopes, so that realized by a plurality of filter cells with single band pass filter identical functions.For example, as shown in Figure 2 (wherein corresponding to the part of Fig. 1 designated identical reference number), in transmitter circuitry 20, each passband of band pass filter 7,11 has been divided into two parts, so that realize single passbands by two filter cells.
In particular, band pass filter 7 comprises two band pass filters 21,22 with mutual different passbands, and the switch 23,24 that is used to change these filters.Desired characteristic can be according to the frequency of RF signal S3, and the variation by switch 23,24 obtains.Band pass filter 11 also comprises two band pass filters 25,26 with mutual different passbands, and the switch 27,28 that is used to change these filters.Desired characteristic can be according to the frequency of RF signal S3, and the variation by switch 27,28 obtains.In this way, can realize having separately the band pass filter 7,11 of smaller size smaller and less loss, even if the volume of switch 23,24 and 27,28 and loss are as negative evaluation.The minimizing of size and power consumption also can be implemented in transmitter circuitry 20 as a whole.
On the other hand, for fear of above-mentioned problem about receiving, the receiver circuit 30 in the portable terminal generally has a gain adjustment circuit that is divided into a plurality of parts as shown in Figure 3.For example, if the signal that receives has 80[dB on the reception antenna of system] level fluctuation, then receiver circuit 30 just need be adjusted 80[dB at least] gain so that constant in the signal level of signal output part 32.Therefore, in receiver circuit 30, adjust 50[dB by intermediate frequency (IF)] and remaining 30[bB] adjust by radio frequency (RF).
Having a 80[dB by what reception antenna 31 received] the RF signal S5 of level fluctuation passes through from band pass filter 33, removing unnecessary frequency content, and then is input to first variable gain amplifier 35 through RF holding wire 34.First variable gain amplifier 35 according to signal level 30[dB] the gain adjustment of width adds to RF signal S5.Like this, the RF signal S5 from the output of first variable gain amplifier 35 will have 30[dB] level fluctuation.After unnecessary frequency content was removed by band pass filter 36, this RF signal S5 was imported into frequency mixer 37, and it carries out frequency translation with local signal S6 there, and was changed into IF signal S7.
IF signal S7 is imported into band pass filter 38, is removed by the nonlinear distortion of frequency mixer 37 generations and the frequency content of disturbing wave, is imported into second variable gain amplifier 39 then.Second variable gain amplifier 39 is 50[dB] wide gain adjustment adds to the IF signal S7 of input, so that the signal level of IF signal S7 is constant.In this way, signal outlet terminal 32 has just had the IF signal of its level constant.
In aforesaid receiving circuit 30, because gain adjustment is divided into two-stage, the signal level variation from input (31) to output (32) just can be limited in maximum 50[dB].In addition, because this has caused the difference between the minimum and maximum signal level of each unit tie point less, so the dynamic range of each unit can be reduced.As a result, receiver circuit 30 can provide a wide dynamic range as a whole, and has limited the dynamic range of each unit.
In these years, as another kind of movable, mobile radio telecommunications trends towards utilizing the frequency band of broad along with the increase of number of communication channels.Therefore, in this case, if band pass filter as shown in Figure 3 33,36 is made of single unit, then can cause inconvenience, for example the volume of filter is very big, produces big electrical loss (in other words, desired characteristic can not be satisfied) or the like at passband.
For fear of these inconvenience, usually, the passband of broadband band-pass filter is divided into a plurality of scopes, so that realize single band pass filter by a plurality of filter cells.For example, as shown in Figure 4, wherein corresponding to the part of Fig. 3 designated identical reference number, receiver circuit 40 has the single band pass filter of being realized by two filter cells, is used for a passband separated into two parts.
In particular, band pass filter 33 comprises two band pass filters 41 and 42 with mutual different passbands, and the switch 43,44 that is used to change these filters.Desired characteristic can obtain by the variation of switch 43,44 according to the frequency of RF signal S5.Band pass filter 36 also comprises two band pass filters 45,46 with mutual different passbands and the switch 47,48 that is used to change these filters.Desired characteristic can obtain by the variation of switch 47,48 according to the frequency of RF signal S5.Like this, can realize having separately the band pass filter 33,36 of smaller size smaller and less loss, even if the volume of switch 43,44 and 47,48 and loss are as negative evaluation.In addition, the minimizing of size and power consumption also can realize in receiver circuit 40 as a whole.
The problem that above-mentioned transmitter circuitry 1,20 exists is that variable gain amplifier 5,8 and power amplifier 9 must provide power supply to be used for gain adjustment always, so that electric power is invalidly consumed.
Particularly because power amplifier 9 is amplifiers of radio-frequency stage, if low level signal inputs to it, its power added efficiency usually is tending towards reducing significantly.Therefore, the adjustment even variable gain amplifier 8 gains worries that also power amplifier 9 can invalidly consume electric power further.
If in transmitter circuitry 1,20, so invalidly consume electric power, then will be shortened with the available time of the communication in the battery-driven portable terminal, therefore draw a serious problem.
Equally, the problem that aforesaid receiver circuit 30,40 exists is that variable gain amplifier 35,39 must provide power supply to be used for gain adjustment always, so that electric power is invalidly consumed.If unwanted like this power consumption power in receiver circuit 30,40, then stand-by time can utilize the time will be shortened in battery-driven portable terminal with communicating by letter, and therefore draws a serious problem.
Still at receiver circuit 30, in 40, if disturbing wave appears in the received signal (S5) of band pass filter 33, variable gain amplifier 35 or frequency mixer 37 may be because the level of disturbing wave be closed by full, and this may cause suppressing the signal that is received and receiving sensitivity is reduced greatly.
In sum, the objective of the invention is to provide the transmitting apparatus and the method for the signal gain that a kind of adjustment is sent out, they can suppress unnecessary power consumption, and a kind of receiving equipment and method of adjusting the received signal gain is provided, and they can suppress useless power consumption.
The present invention is above-mentioned to be realized by the transmitter apparatus with gain modifier that provides with other purpose.This gain modifier comprises: be used for a plurality of outputs of the first signal-line choosing device one by one are connected to a plurality of inputs of secondary signal line options device and have many signal line of different mutually gains by signal amplifying apparatus; And holding wire control device, be used for by control signal being added to the control end of the first and second signal-line choosing devices, go to be controlled at the conversion of annexation in the first and second signal-line choosing devices, wherein the holding wire control device is selected the holding wire an of the best from many signal line, to finish sending the gain adjustment of signal, this signal is added to the input of the first signal-line choosing device.This shows that the power consumption of each signal amplifying apparatus can be optimised according to its yield value, and the non-selected signal amplifying apparatus of holding wire is prevented from operation, thereby can suppresses unnecessary power consumption.
In addition, according to the present invention, secondary signal line options device is made of the directional coupler that comprises parallel two wires.The signal-line choosing device of gain modifier is made of a directional coupler, so that reduce the insertion loss that the signal-line choosing device produces.
Further, according to the present invention, second line that constitutes the directional coupler of secondary signal line options device is connected to the prearranged signal level detection device.The signal-line choosing device of close outlet side is made of a directional coupler, and second line of this directional coupler is connected to prearranged signal line options device, so that the signal level detector collection appears at the signal voltage value on second line, and can easily detect the transmission signal level that to export at last.Therefore, this signal-line choosing device equally is used at signal level detection neutralisation signals level extraction element, so that further simplified structure.
In addition, according to the present invention, the gain modifier that comprises in the transmitting apparatus comprises: be used for that a plurality of outputs of the first signal-line choosing device one by one are connected to a plurality of inputs of secondary signal line options device and have many first holding wires of mutually different gains by signal amplifying apparatus; Be used for a plurality of outputs of the 3rd signal-line choosing device one by one be connected to the first signal-line choosing device a plurality of inputs, utilize filter apparatus to have many secondary signal lines of mutually different bandpass characteristics; And holding wire control device, be used for by control signal is added to first, the control end of the second and the 3rd signal-line choosing device goes to be controlled at first, the conversion of annexation in the second and the 3rd signal-line choosing device, wherein the holding wire control device is selected an optimum signal line from first and second holding wires, to finish sending the gain adjustment of signal, this signal is added to the input of the 3rd signal-line choosing device, and changes a passband.This shows, owing to can prevent the operation of the signal amplifying apparatus of non-selected holding wire, thus can suppress unnecessary power consumption, simultaneously also can the conversion bandpass characteristic.
In addition, according to the present invention, the gain modifier that comprises in the transmitting apparatus comprises: be used for a plurality of outputs of the first signal-line choosing device one by one being connected to a plurality of inputs of secondary signal line options device and utilizing signal amplifying apparatus to have many first holding wires of different mutually gains; Be used for a plurality of outputs of secondary signal line options device one by one being connected to a plurality of inputs of the 3rd signal-line choosing device and utilizing filter apparatus to have many secondary signal lines of different mutually bandpass characteristics; And holding wire control device, by control signal is added to first, the control end of the second and the 3rd signal-line choosing device goes to be controlled at first, the conversion of the annexation in the second and the 3rd signal-line choosing device, wherein the holding wire control device is selected an optimum signal line from first and second holding wires, to finish being sent out the gain adjustment of signal, this signal is added to the input of the first signal-line choosing device, and changes a passband.By this way, owing to can stop the operation of the signal amplifying apparatus of non-selected holding wire,, also can change pass-band performance simultaneously so can suppress unnecessary power consumption.
Further, according to the present invention, the gain modifier that transmitting apparatus comprises comprises: be used for a plurality of outputs of the first signal-line choosing device one by one being connected to a plurality of inputs of secondary signal line options device and utilizing signal amplifying apparatus to have many first holding wires of different gains; Be used for a plurality of outputs of the 3rd signal-line choosing device one by one being connected to a plurality of inputs of the first signal-line choosing device and utilizing filter apparatus to have many secondary signal lines of different mutually pass-band performances; Be used for a plurality of outputs of secondary signal line options device one by one being connected to a plurality of inputs of the 4th signal-line choosing device and utilizing filter apparatus to have many articles the 3rd holding wires of different mutually pass-band performances; And holding wire control device, by control signal is added to first, the control end of the second, the third and fourth signal-line choosing device goes to control the first, the second, the conversion of the annexation in the third and fourth signal-line choosing device, wherein the holding wire control device is selected an optimum signal line from the first, the second and the 3rd holding wire, to finish sending the gain adjustment of signal, this signal is added to the input of the 3rd signal-line choosing device, and changes a passband.This shows,,, also can change pass-band performance simultaneously so can suppress unnecessary power consumption owing to can stop the work of the signal amplifying apparatus of non-selected holding wire.
In addition, according to the present invention, the many signal line that have different gains have mutually been equipped signal amplifying apparatus in advance.Then, be examined and also be examined, so that go to determine to select any signal line according to the level difference of calculating between two level in the transmission signal level of holding wire input side in the desired transmission signal level of holding wire outlet side.Suitably select holding wire according to the result who determines, so that the signal that will be sent out is carried out suitable gain adjustment.Therefore, can stop the signal amplifying apparatus work of non-selected holding wire, and suppress unnecessary power consumption.
Further, above-mentioned and other purpose the receiver device realization by providing of the present invention with gain modifier.This gain modifier comprises: be used for a plurality of outputs of the first signal-line choosing device one by one being connected to a plurality of inputs of secondary signal line options device and utilizing signal amplifying apparatus to have many signal line of different mutually gains; And holding wire control device, by control signal being added to the control end of the first and second signal-line choosing devices, go to be controlled at the conversion of the annexation in first and second signal selectings, wherein the holding wire control device is selected the holding wire an of the best from many signal line, to finish sending the gain adjustment of signal, this signal is added to the input of the first signal-line choosing device.By this way, the power consumption of each signal amplifying apparatus can be optimised according to its yield value, and the non-selected signal amplifying apparatus of holding wire is prevented from work, therefore can suppress unnecessary power consumption.In addition, if the signal that is received has enough level, then select to have the holding wire of low gain, even so that disturbing wave in frequency acceptance band, occurs, this signal amplifying apparatus also can prevent saturated, signal to prevent to suppress to be received makes it can avoid owing to disturbing wave reduces receiving sensitivity like this.
In addition, according to the present invention, the first signal-line choosing device is made of the directional coupler that comprises parallel two wires.The signal-line choosing device of gain modifier is made of a directional coupler, so that reduce the insertion loss that the signal-line choosing device produces.
Further, according to the present invention, second line that constitutes the directional coupler of the first signal-line choosing device is connected to the prearranged signal level detection device.The signal-line choosing device of close outlet side is made of a directional coupler, and second line of this directional coupler is connected to the prearranged signal level detection device, so that the signal level detector collection appears at the signal voltage value on second line, and can easily detect the received signal level that is transfused to.Therefore, this signal-line choosing device and signal level extraction element are used in the signal level detection together, so that further simplified structure.
In addition, according to the present invention, the gain modifier that comprises in the receiving equipment comprises: be used for a plurality of outputs of the first signal-line choosing device one by one being connected to a plurality of inputs of secondary signal line options device and utilizing signal amplifying apparatus to have many first holding wires of different mutually gains; Be used for a plurality of outputs of the 3rd signal-line choosing device one by one being connected to a plurality of inputs of the first signal-line choosing device and utilizing filter apparatus to have many secondary signal lines of different mutually bandpass characteristics; And holding wire control device, by control signal is added to first, the control end of the second and the 3rd signal-line choosing device goes to be controlled at first, the conversion of the annexation in the second and the 3rd signal-line choosing device, wherein the holding wire control device is selected an optimum signal line from first and second holding wires, finishing gain adjustment, and change a passband to the received signal that is added in the 3rd signal-line choosing device input.By this way, owing to can prevent the work of the signal amplifying apparatus of non-selected holding wire, so can suppress unnecessary power consumption.Simultaneously, bandpass characteristics also can be converted.
In addition, according to the present invention, the gain modifier that comprises in the receiving equipment comprises: be used for a plurality of outputs of the first signal-line choosing device one by one being connected to a plurality of inputs of secondary signal line options device and utilizing signal amplifying apparatus to have many first holding wires of different gains; Be used for a plurality of outputs of secondary signal line options device one by one being connected to a plurality of inputs of the 3rd signal-line choosing device and utilizing filter apparatus to have many secondary signal lines of different mutually bandpass characteristics; And holding wire control device, by control signal is added to first, the control end of the second and the 3rd signal-line choosing device goes to be controlled at first, the conversion of the annexation in the second and the 3rd signal-line choosing device, wherein the holding wire control device is selected an optimum signal line from first and second holding wires, finishing gain adjustment, and change a passband to the received signal that is added in the first signal-line choosing device input.By this way, owing to can stop the work of the signal amplifying apparatus of non-selected holding wire, so can suppress unnecessary power consumption.Simultaneously also can change pass-band performance.
Further, according to the present invention, the gain modifier that comprises in the receiving equipment comprises: be used for that a plurality of outputs of the first signal-line choosing device one by one are connected to a plurality of inputs of secondary signal line options device and utilize signal amplifying apparatus to have many first holding wires of different gains, be used for a plurality of outputs of the 3rd signal-line choosing device one by one be connected to the first signal-line choosing device a plurality of inputs and utilize filter apparatus to have different many secondary signal lines of pass-band performance mutually; Be used for a plurality of outputs of secondary signal line options device one by one be connected to the 4th signal-line choosing device a plurality of inputs and utilize filter apparatus to have mutually different many articles the 3rd holding wires of pass-band performance; And holding wire control device, by control signal is added to first, second, the control end of the third and fourth signal-line choosing device goes to control the conversion of the annexation in the first, the second, the third and fourth signal-line choosing device, wherein the holding wire control device is from first, select an optimum signal line in the second and the 3rd holding wire, finishing adjustment, and change a passband the received signal that is added in the 3rd signal-line choosing device input.This shows, owing to can stop the work of the signal amplifying apparatus of non-selected holding wire, so can suppress unnecessary power consumption.Simultaneously also can change pass-band performance.
In addition, according to the present invention, the many signal line that have different gains have separately been equipped signal amplifying apparatus in advance.Then, the received signal level that is added to this holding wire input side is examined.Suitably select a signal line according to the signal level of checking, the received signal of the output signal level that requires arrives the outlet side of holding wire, so that finish the optimum gain adjustment to received signal.Therefore, the signal amplifying apparatus of non-selected holding wire can be prevented from work, and unnecessary power consumption can be suppressed.
Characteristic of the present invention, principle and use are when reading in conjunction with the accompanying drawings, and what become by following detailed is more clear, and identical part has been specified same reference number or character in its accompanying drawing.
In the accompanying drawings:
Fig. 1 is the block diagram of expression general transmit machine circuit;
Fig. 2 is that expression has the block diagram of a dipartite general transmit machine circuit of band pass filter
Fig. 3 is the block diagram of the common receiver circuit of expression;
Fig. 4 is that expression has the block diagram of a dipartite common receiver circuit of band pass filter
Fig. 5 is the block diagram of the gain modifier of the expression transmitter circuitry that is used to illustrate the principle of the invention;
Fig. 6 is the flow chart that is illustrated in holding wire control device control procedure in the gain control;
Fig. 7 is the block diagram of expression according to the transmitter circuitry of first embodiment of the invention;
Fig. 8 is the flow chart of expression according to the signal line control circuit control procedure of first embodiment of the invention;
Fig. 9 is the block diagram of expression according to the transmitter circuitry of second embodiment of the invention;
Figure 10 is the flow chart of expression according to the signal line control circuit control procedure of second embodiment of the invention;
Figure 11 is the block diagram of expression according to the transmitter circuitry of third embodiment of the invention;
Figure 12 is the block diagram of direction coupler work;
Figure 13 is the performance diagram of expression according to the transmitter circuitry dynamic range example of third embodiment of the invention;
Figure 14 is the performance diagram that expression is used to illustrate dynamic range dynamic range example relatively under general case;
Figure 15 is the performance diagram that is used for illustrating at first embodiment dynamic range dynamic range example relatively;
Figure 16 is the block diagram of expression according to the transmitter circuitry of fourth embodiment of the invention;
Figure 17 is the block diagram of the gain modifier of the expression receiver circuit that is used to illustrate the principle of the invention;
Figure 18 is the flow chart that is illustrated in holding wire control device control procedure in the gain modifier;
Figure 19 is the block diagram of expression according to the receiver circuit of fifth embodiment of the invention;
Figure 20 is the flow chart of expression according to the signal line control circuit control procedure of fifth embodiment of the invention;
Figure 21 is the block diagram of expression according to the receiver circuit of sixth embodiment of the invention;
Figure 22 is the signal line control circuit control procedure flow chart of expression according to the 6th embodiment;
Figure 23 is the block diagram of expression according to the receiver circuit of the 7th embodiment; With
Figure 24 is the block diagram of expression according to the receiver circuit of the 8th embodiment.
These preferred embodiments of the present invention are described below with reference to accompanying drawings.
(1) transmitter circuitry
(1-1) first embodiment
The principle of transmitter circuitry at first, is described with reference to Fig. 5.In being applied to transmitter circuitry of the present invention, gain modifier 50 as shown in Figure 5 is used to finish the adjustment of gain, suppresses unnecessary power consumption simultaneously again.
This gain modifier 50 generally comprises the first and second signal-line choosing devices 51,52 that have a plurality of input and output sides separately; Many signal line 53 to 56 with different gains are used for connecting between the first and second signal-line choosing devices 51,52; And the holding wire control device, be used to control the selection operation of the first and second signal-line choosing devices 51,52.
At first, the first signal-line choosing device 51 has an input 58 at least, a plurality of outputs 59 and a control end 60, and be configured it can be responded by the annexation of the added control signal S10 conversion of control end 60 between input 58 and output 59.
Secondary signal line options device 52 has a plurality of inputs 61 and at least one output 62 again, and a control end 63, and is configured it can be responded by the annexation of control end 63 added control signal S11 conversions between input 61 and output 62.
The output 59 of signal-line choosing device 51 is connected to the input 61 of signal-line choosing device 52 by the holding wire 53 to 56 that has different gains mutually.In this configuration, the signal amplifying apparatus 64 to 67 that has different gains mutually is inserted in respectively in the holding wire 53 to 56, so that each holding wire has different gains.
Control the first and second signal-line choosing devices 51, the signal line (53 to 56) that the holding wire control device 57 of 52 selection operations will be selected according to the signal level decision that outputs to output 62, and the result according to decision exports control signal S10, S11 removes the selection operation of control signal wire choice device 51,52.
More particularly, in this case, the control procedure that holding wire control device 57 is carried out as shown in Figure 6.This control procedure at first begins at step SP1, and control device 57 is read as the transmitted power data that are output to the signal level of output 62 at step SP2.Then at step SP3, control device 57 is read the signal level data of the input signal that adds to input 58.Then at step SP4, the level difference that control device 57 calculates between two sense datas, and determine to select any signal line according to the level difference of calculating.Then at step SP5, control device 57 is exported control signal S10 according to the result who determines, S11, so the selection operation of switching signal line options device 51,52 removes to select an optimum signal line.After finishing this processing, holding wire control device 57 proceeds to step SP7 and goes to stop this processing.
Like this, the signal level that gain modifier 50 bases will be exported is transformed into output 62 to holding wire 53 to 56, finishes the gain adjustment of whole transmitter circuitry.In this case, because signal amplifying apparatus 64 to 67 has fixing yield value, so gain modifier 50 carries out single gain adjustment.Therefore, gain modifier 50 can be kept the optimal power of each signal amplifying apparatus 64 to 67 according to each yield value, and can also close the signal amplifying apparatus that is arranged in the non-selected holding wire, makes it can suppress unnecessary power consumption like this.
By the way, at least one in many signal line 53 to 56 can replace with the pure transmission channel that does not have signal amplifying apparatus, perhaps many signal line 53 to 56 at least one in insert an attenuator and replace a signal amplifying apparatus.Like this, can produce big many gain inequalities.And in this case,, therefore not expending electric power because attenuator and transmission channel are parasitic element substantially, unnecessary power consumption just can be suppressed further.
Here, aforesaid practical combinations have the gain modifier 50 transmitter circuitry be shown among Fig. 7, wherein corresponding to the part of Fig. 1 designated identical label.In transmitter circuitry 70, gain changes the gain modifier 50 of circuit 71 corresponding to the front.Gain changes the gain adjustment that circuit 71 is carried out RF band.
Generally speaking, this gain change circuit 71 comprises holding wire change over switch 72,73; The holding wire 74,75 that has different gains by the conversion of holding wire change over switch 72,73; And the signal line control circuit 76 that is used for the conversion operations of control signal wire change over switch 72,73.In other words, holding wire change over switch 72,73 is corresponding to the signal-line choosing device 51,52 of front, and holding wire 74,75 is corresponding to the holding wire 53 to 56 of front, and signal line control circuit 76 is corresponding to the holding wire control device 57 of front.
The holding wire 74 that changes one of circuit 71, two signal line with regard to gain does not have the transmission channel of amplifier to constitute by one.And other holding wire 75 has and is used to amplify electrical power, for example 20[dB] amplifier 77.By the way, the electrical power that the amplifier of arranging in holding wire 75 77 consumes is optimised according to yield value.
Signal line control circuit 76 output control signal S10, S11 removes switching signal line change over switch 72,73, thereby selects in two signal line 74,75 one.In this case, the signal level that signal line control circuit 76 needs in the inspection of transmitting antenna end is to determine RF signal S3 whether amplify by required power.When required power was amplified, signal line control circuit 76 was selected holding wire 75, and when required power is not amplified, selected holding wire 74.As a reference, when holding wire 74 is selected, by signal line control circuit 76 shutdown amplifiers 77.
In view of this, these gain change circuit 71 switching signal lines (74,75) go to finish gain adjustment.In this case, gain changes circuit 71 can adopt two gain-state: one is the 0[dB when holding wire 74 is selected] state, and another is the 20dB state when holding wire 75 is selected.This clearly, the gain adjustment of RF level is discontinuous.Therefore, in transmitter circuitry 70 because the IF level has the variable gain amplifier 5 that can gain continuously and adjust, thus continuous gain adjustment undertaken by variable gain amplifier 5, with the discontinuous gain adjustment of compensation RF level.In other words, transmitter circuitry 70 produces final desired gain by two unit, and gain-variable circuit 71 carries out the continuous gain adjustment that discontinuous gain adjustment and variable gain amplifier 5 carry out.
Specifically describe the control procedure of signal line control circuit 76 below with reference to flow chart shown in Figure 8.At first, control procedure starts from step SP10, and at step SP11, control circuit 76 is read as the transmitted power data " A " at transmitting antenna level information that end requires.Then at step SP12, control circuit 76 is read the reference level " B " that is used for the switching signal line.In this case, reference level replaces the signal level of RF signal S3 to be read out, and this is because have only two circuits that will change, so that only by determining whether desired transmitted power surpasses reference level and just know to select which signal line.
Then at step SP13, the transmitted power data " A " of reading compare with reference level " B ".As a result, when transmitted power data " A " hour, control procedure proceeds to step SP14, and when transmitted power data " A " greatly the time, control procedure proceeds to step SP15.
At step SP14, signal control circuit 76 control signal wire change over switches 72,73 go to select the signal line 74 that only is made of transmission channel.On the other hand, at step SP15, the holding wire 75 that signal line control circuit 76 control signal wire change over switches 72,73 go to select to have predetermined gain, and connect the amplifier 77 that produces gain.
After the processing of completing steps SP14 or step SP15, control procedure proceeds to next procedure SP16, and the gain of variable gain amplifier 5 is adjusted there, to adjust the gain of whole transmitter circuitry 70.The RF signal S3 that this causes transmitting antenna 2 to be coupled with being amplified to the power level that requires.In other words, satisfied in the desired signal level of transmitting antenna end.After completing steps SP16, control procedure proceeds to step SP17 with termination.
For the configuration of front, change in gain under the situation of circuit 71, gain is adjusted by conversion and is finished by two signal line 74,75 of having arranged to have different gains.Specifically, check, and when required power is amplified, select to have the holding wire 75 of amplifier 77, and when required power is not amplified, select not have the holding wire 74 that only constitutes of amplifier by transmission channel in the desired signal level of transmitting antenna end.In this case, only when having selected holding wire 75 amplifier 77 just work.Therefore, do not work amplifier does not need to resemble in the past always, make it might suppress unnecessary power consumption.In addition, by using the aforesaid transmitter circuitry 70 that circuit 17 changes gain that changes by gaining, can prolong the life-span of battery of mobile terminal, thereby the communication that can produce than length can utilize the time.
By the way, because gain changes the adjustment that gains of two signal line 74,75 that circuit 71 has a different gains by conversion, result's gain is discontinuous.For this reason, transmitter circuitry 70 has utilized the variable gain amplifier 5 that is arranged in the IF level to compensate discontinuous change in gain, so that whole required change in gain to be provided.Change circuit 71 and variable gain amplifier 5 with gain both carry out the power adjustment by this, the dynamic range of each unit also can reduce in transmitter circuitry 70.
Further, when low level signal was transfused to, the power amplifier of RF level trended towards making power added efficiency poor.Even change the amplifier adjustment that gains by the gain of IF level, power also can bootlessly be consumed by the power amplifier of RF level.Therefore, in this embodiment, amplifier 77 is only worked where necessary, so that reduce unhelpful power consumption.
According to the configuration of front, this gain is adjusted by conversion and is only realized by transmission channel holding wire that does not have amplifier 74 that constitutes and the holding wire 75 with amplifier 77.And amplifier 77 is only just worked when having selected holding wire 75, so as this amplifier needn't resemble before always work, thereby make it might suppress unnecessary power consumption.
(1-2) second embodiment
Fig. 9 represents the transmitter circuitry 79 according to second embodiment of the invention, wherein corresponding to those parts among Fig. 2 designated identical label.First embodiment has in front described gain and has only changed the situation that circuit 75 is converted by gain, and this embodiment changes circuit conversion band pass filter and gain by gain.
This gain modifier 80 generally comprises holding wire change over switch 81,82 and 83,84; Two signal line 85,86 with different gains; Band pass filter 21,21 and 25,26 with different passbands; And the signal line control circuit 87 that is used for the conversion operations of control signal wire change over switch 81,82 and 83,84.
Holding wire change over switch 81 comprises a ring switch that is made of four switch 81A to 81D that connect into annular, wherein four two relative intersection points that connect intersection point are used as input, and remaining two intersection point is as output, so that input can be connected by an independent switch with output.In this case, two inputs are connected respectively to band pass filter 21,22, and two outputs are connected respectively to holding wire 85,86.Like this, holding wire change over switch 81 connects at band pass filter 21,22 and 85,86 conversions of holding wire.
Equally, holding wire change over switch 82 also comprises a ring switch that is made of four switch 82A to 82D that connect into annular, wherein four two relative intersection points that connect intersection point are as input, and remaining two intersection point is as output, so that input can be connected by the switch of a unit with output.In this case, two inputs are connected respectively to holding wire 85,86, and two outputs are connected respectively to band pass filter 25,26.Like this, holding wire change over switch 82 is changed connection between holding wire 85,86 and band pass filter 25,26.
Then, holding wire change over switch 83 is switches that are used to change the filter that adds to RF signal S3, and one of band pass filter 21,21 is connected to frequency mixer 6.Holding wire change over switch 84 also is a switch, is used for the RF signal S3 that has been limited bandwidth by band pass filter 25 or band pass filter 26 is offered transmitting antenna 2, and one of band pass filter 25,26 is connected to transmitting antenna 2.
Still in this embodiment, the holding wire 85 of one of two signal line only is made of transmission channel, and does not have amplifier, and another holding wire 86 be constituted as by amplifier 88 undertaken as 20[dB] power amplification.By the way, still in this embodiment, the power consumption that is arranged in the amplifier in the holding wire 86 is optimised according to yield value.
Band pass filter 21,22nd has the filter of mutual different passbands, so that these two filters cover the whole bandwidth of RF signal S3.Simultaneously, band pass filter 25,26th has the filter of mutual different passbands, so that these two filters cover the whole bandwidth of RF signal S3.By such division passband, the band pass filter of smaller size smaller and less loss also can be realized in transmitter circuitry 79.
Signal line control circuit 87 output control signal S20, S21 removes switching signal line change over switch 81,82, and output control signal S22, and S23 removes switching signal line change over switch 83,84.In this case, signal line control circuit 87 is checked in the required signal level of transmitting antenna end, to determine RF signal S3 whether amplify by required power.Signal line control circuit 87 is selected holding wire 86 when required power is amplified, and selects holding wire 85 when required power is not amplified.As a reference, when holding wire 85 was selected, amplifier 88 cut out by signal line control circuit 87.
Signal line control circuit 87 is also checked the frequency that RF signal S3 uses, and should select which band pass filter with definite, and according to the line of the switching signal as a result change over switch of determining 81 to 84.
By the way, still in this embodiment,, be discontinuous so result's gain is adjusted at the RF level because gain is adjusted by selecting a signal line (85,86) to finish.Owing to this reason, in transmitter circuitry 79, the variable gain amplifier 5 of intermediater-frequency stage is adjusted gain continuously, with the discontinuous gain adjustment of compensation in the RF level.
Specifically describe the control procedure of signal line control circuit 87 now with reference to the flow chart of Figure 10.At first, control procedure starts from step SP20, and at step SP21, control circuit 76 is read as the transmitted power data " A " at transmitting antenna level information that end requires, and reads the reference level " B " that is used for the switching signal line at next step SP22.Then at step SP23, control circuit 87 is read the frequency " f " that RF signal S3 uses, and reads the reference frequency " f that is used for the conversion bandpass filter at step SP24
o".
Then, transmitted power data " A " of reading and reference level " B " are compared at step SP25.As a result, control procedure hour proceeds to step SP26 in transmitted power data " A ", proceeds to step SP27 when transmitted power data " A " are big.
At step SP26, frequency of utilization of reading " f " and reference frequency " f
o" compare.As a result, control procedure proceeds to step SP28 when used frequency " f " is low, proceed to step SP29 when used frequency " f " is higher.
When control procedure proceeds to step SP28, signal line control circuit 87 is transformed into band pass filter 21 sides to holding wire change over switch 83, holding wire change over switch 84 is transformed into band pass filter 25 sides, and the switch 82A of the switch 81A of connection signal line change over switch 81 and holding wire change over switch 28.Like this, RF signal S3 passes through band pass filter 21 successively, and holding wire 85 and band pass filter 25 are added to transmitting antenna 2.
On the other hand, when control procedure proceeds to step SP29, signal line control circuit 87 is transformed into band pass filter 22 sides to holding wire change over switch 83, holding wire change over switch 84 is transformed into band pass filter 26 sides, and the switch 82D of the switch 81B of connection signal line change over switch 81 and holding wire change over switch 82.Like this, RF signal S3 passes through band pass filter 22 successively, and holding wire 85 and band pass filter 26 are added to antenna 2.
When control procedure proceeds to step SP27, institute's frequency of utilization " f " of reading and reference frequency " f
o" compare in the same way.As a result, control procedure proceeds to step SP30 when used frequency " f " is low, proceed to step SP31 when used frequency " f " is higher.
When control procedure proceeds to step SP30, signal line control circuit 87 switching signal line change over switches 83 are to band pass filter 21 sides, switching signal line change over switch 84 is to band pass filter 25 sides, the switch 81D of connection signal line change over switch 81 and the switch 82B of holding wire change over switch 82, and connect amplifier 88.Like this, RF signal S3 passes through band pass filter 21 successively, and holding wire 86 and band pass filter 25 are added to transmitting antenna 2.
On the other hand, when control procedure proceeds to step SP31, signal line control circuit 81 switching signal line change over switches 83 are to band pass filter 22 sides, switching signal line change over switch 84 is to band pass filter 26 sides, the switch 81C of connection signal line change over switch 81, the switch 82C of connection signal line change over switch 82, and connect amplifier 88.RF signal S3 passes through band pass filter 22 successively like this, and holding wire 86 and bandpass filtering 26 are added to transmitting antenna 2.
Finish aforesaid step SP28, SP29, after the processing of SP30 or SP31, the gain of variable gain amplifier 5 has been transferred to the gain that meets whole transmitter circuitry 79.After the processing of completing steps SP32, control procedure proceeds to step SP33 to stop this processing.
Utilize the configuration of front in this embodiment, band pass filter is converted with the gain adjustment of finishing by gain change circuit 80.In this case, signal line control circuit 87 is controlled at the on off state that gain changes the holding wire change over switch 81 to 84 in the circuit 80, finishes the conversion of gain adjustment and band pass filter simultaneously.
By the way, in this embodiment, be converted by the holding wire change over switch 81 that contains ring switch having between one of two signal line of different pass-band performances (promptly have the holding wire of band pass filter 21 and have the holding wire of bandpass filtering 22) and one of two holding wires 85,86 with different gains.
When this connection was changed by aforesaid holding wire change over switch 81 with ring switch, the insertion loss that produces in holding wire change over switch 81 can reduce.This is because in ring switch, holding wire is converted by a switch of connecting among four switch 81A to 81D, so that only inserted a switch in holding wire.Usually, be connected, often finish conversion by the combination of two switches in order between one of two lines of one of two lines of input side and outlet side, to change.Therefore in this case, in holding wire, insert two switches, and cause bigger insertion loss.On the other hand, when using ring switch, only there is a switch to be inserted into holding wire, so that can reduces the insertion loss as the situation of this embodiment.
Still in this embodiment, holding wire change over switch 82 conversions of connection between one of two signal line 85,86 with different gains and two signal line (promptly have the holding wire of band pass filter 25 and have the holding wire of band pass filter 26) by containing a ring switch with different pass-band performances.By the same token, the insertion loss in this section also can reduce.
By the way, still in this embodiment, owing to 88 in amplifier is just worked when having selected holding wire 86, so useless power consumption can be suppressed.In addition, whole gain adjustment changes circuit 80 and variable gain amplifier 5 by gain, and these two carries out, and the dynamic range of each unit can reduce.
Configuration according to the front, because the holding wire change over switch 81 of each self-contained ring switch, 82 are used to the switching signal line, thus can change simultaneously in one of holding wire with different pass-band performances and being connected of holding wire 85,86 with different gains, and have lower insertion loss.
(1-3) the 3rd embodiment
In Figure 11, the as a whole transmitter circuitry according to the 3rd embodiment is made in label 90 expressions.Under the situation of this transmitter circuitry 90, gain changes circuit 91 and is used to the power consumption that suppresses unnecessary and finishes gain adjustment.
At first, the IF signal S1 with constant level that sends here from input 3 is input to a variable gain amplifier 5 through IF holding wire 4, and IF signal S1 is adjusted 50[dB there] wide gain.For example, in variable gain amplifier 5, the digital gain control signal of being exported by specific control device is transformed into the analog signal that is provided, so that control required yield value.
The IF signal S1 that adjusts to desirable value by variable gain amplifier 5 then is imported into frequency mixer 6, and IF signal S1 utilizes local signal S2 to carry out frequency translation there, changes the RF signal S3 with high frequency into.By after being used to finish the RF drive circuit 92 of predetermined signal processing, RF signal S3 is imported into gain and changes circuit 91.This RF drive circuit 92 is by band pass filter, compositions such as buffer amplifier, and remove by the unnecessary frequency content among the RF signal S3 of frequency mixer 6 frequency conversions.RF drive circuit 92 further carries out impedance adjustment etc. when RF signal S3 is added to gain change circuit 91.
When RF signal S3 need amplify, gain changed circuit 91 and allows RF signal S3 by having the holding wire of certain gain value, and only passes through transmission channel when RF signal S3 does not need to amplify.Therefore, RF signal S3 is adjusted the desired signal level that gains and require in antenna end.Be added to the transmitting antenna 2 of radiation at last by the RF signal S3 of above-mentioned gain adjustment.
Gain changes circuit 91 and generally comprises holding wire change change over switch 93,94; The holding wire 95,96 that has different gains by the conversion of holding wire change over switch 93,94; Signal line control circuit 97 with the switching manipulation that is used for control signal wire change over switch 93.
Change in gain under the situation of circuit 91, the signal line 96 in two signal line only is made of transmission channel, and does not have amplifier, and another signal line 95 is so constructed so that can be undertaken as 10[dB by amplifier (PA) 98] power amplification.In addition, the power consumption of the amplifier 98 that provides of holding wire 95 is optimised according to this yield value.
Holding wire change over switch 93 comprises a switch that is made of semiconductor switch, and wherein, RF drive circuit 92 is connected to input and holding wire 95,96 is connected respectively to two outputs.Holding wire change over switch 93 conversion RF signal S3 pass through to be routed to one of two signal line 95,96.
On the other hand, this holding wire change over switch 94 is by comprising parallel two wires (94A, the switch that 94B) directional coupler constitutes, and RF signal S3 is outputed to transmitting antenna 2 by holding wire 95 or holding wire 96.More particularly, in holding wire change over switch 94, holding wire 95 is connected to the end of the first line 94A, and transmitting antenna 2 is connected to the other end, so that added to transmitting antenna 2 by the RF signal S3 of holding wire 95 through the first line 94A.Holding wire 96 also is connected to the end of the second line 94B, be connected to the other end and have with the resistance R 1 of value, gather by the first line 94A so that the RF signal S3 by holding wire 96 passes through to be coupled between the line of the parallel two wires that adds to transmitting antenna 2 with the impedance phase of the second line 94B.
Control signal of signal line control circuit 97 outputs 25 is given holding wire change over switch 93, with the annexation of basis at the required signal level control signal wire change over switch 93 of transmitting antenna end.More particularly, the signal level that signal line control circuit 97 is checked at the needs of transmitting antenna end is to determine RF signal S3 whether amplify by required power.Signal line control circuit 97 is transformed into holding wire 95 to holding wire change over switch 93 when required power is amplified, when required power is not amplified holding wire is transformed into holding wire 96.As a reference, when holding wire 96 is selected, because required power is amplified, so the amplifier 88 that provides at holding wire 95 is closed by signal line control circuit 97.
With reference to Figure 12 the directional coupler that constitutes holding wire change over switch 94 is described below.As shown in figure 12, generally (100A 100B) constitutes directional coupler 100, and it is by connecting and line 100A the characteristic impedance (Z of 100B respectively by two parallel lines
o) the load RA to RD of identical impedance realizes to the operation of four terminals (101A to 101D).
For example, when row ripple " a " passes through line 100A, be coupling between line with respect to signal wave " b " occurring on the reciprocal line 100B of row ripple " a " by parallel two wires.At this moment, the signal level of signal wave " b " is the signal level that depends on the coupling loss of parallel two wires.Otherwise when row ripple " b " passed through line 100B, signal wave a went up appearance by the reciprocal line 100A that is coupling between line with respect to row ripple " b " equally.
As a reference, if the impedance operator of the load RA to RD that is connected to line 100A or line 100B and circuit is not inconsistent, then produces reflected wave at line end, and also appear on another line by coupled reflection ripple between line because impedance is lost.For example, when the impedance load RD that is different from characteristic impedance Zo is connected to terminal 101D, the reflected wave " c " of row ripple " a " occurs on the online 100A, and the signal wave " d " that in the opposite direction has in this case, the signal level that depends on coupling loss also occurs on the online 100B by coupling between line.
Like this, directional coupler 100 is parasitic elements of a directivity with four ends and has reversible relation between each terminal.
Gain change circuit 91 according to this embodiment uses these directional couplers 100 to remove to constitute holding wire change over switch 94, so that export RF signal S3 to transmitting antenna 2 by holding wire 95 or holding wire 96.
For the configuration of front, change in gain under the situation of circuit 91, gain is adjusted and has been arranged to have that two signal line 95,96 of different gains realize by conversion.Specifically, check, and it is selected when required power is amplified to have a holding wire 95 of amplifier 98, and it is selected when the required power amplification not only to constitute the holding wire 96 that do not have amplifier by transmission channel in the required signal level of transmitting antenna end.In this case, amplifier 98 is only just worked when having selected holding wire 95.Like this, always work this amplifier needn't resemble in the past, make it can suppress unnecessary power consumption.Therefore, by using aforesaid transmitter circuitry 90 by the change circuit 91 adjustment gains that gain, the battery life of portable terminal can prolong, and the communication that therefore can produce than length can utilize the time.
By the way, because gain changes the adjustment that gains of two signal line 95,96 that circuit 91 has a different gains by conversion, so the gain adjustment that obtains is discontinuous.For this reason, transmitter circuitry 90 utilizes the discontinuous change in gain of variable gain amplifier 5 compensation of arranging in the IF level, changes so that a required gain to be provided as a whole.Change both gain adjustment of carrying out of circuit 91 and variable gain amplifier 5 by this with gain, the dynamic range of each unit also can reduce in transmitter circuitry 90.
Figure 13 is illustrated in an example that is made of dynamic range under the situation of a portable terminal above-mentioned transmitter circuitry 90.As a reference, Figure 14 be illustrated in by common single variable gain amplifier gain example of dynamic range under the situation about adjusting and Figure 15 be illustrated in by as the gain of first embodiment change circuit 71 and variable gain amplifier 5 the two realize an example of dynamic range under the situation that gain adjusts.It should be noted that, " MOD " expression modulator among the figure, " PAD " represents attenuator, " AGC1 " represents variable gain amplifier, and " BPF " represents band pass filter, and " MIXER " represents frequency mixer, " RFD " expression RF drive circuit, " PA " represents amplifier, and " DUP " represents duplicate circuitry, and " AGC2 " expression gain changes circuit.
As shown in figure 13, in the variable gain amplifier AGC1 of IF level, carry out 50[dB] wide gain adjustment, with change among the circuit AGC2 in the gain of RF level carry out 25[dB] under the wide gain situation about adjusting, for this gain adjustment is divided into two-stage, each unit from variable gain amplifier to the RF drive circuit has 50[dB] dynamic range be enough.Otherwise, as shown in figure 14, in common variable gain amplifier, use 80[dB] under the wide situation about adjusting that gains, each unit from variable gain amplifier to the RF drive circuit needs 80[dB] dynamic range.By dividing gain adjustment in this way, the dynamic range of each unit can be reduced.
And, as shown in figure 14, carrying out 80[dB by common variable gain amplifier] under the wide gain situation about adjusting, an attenuator that need have the high attenuation amount in prime is so that entirely reduce level curve.Therefore under regular situation, the out of band signal level has produced inconvenience owing to the severe noise factor uprises.So, as shown in figure 13,, provide the attenuation of attenuator in the variable gain amplifier prime if gain allocation is separated, then can prevent the problems referred to above.
In addition, very clear from Figure 15, still in first embodiment, improve by same method for the problem of dynamic range or out of band signal level.
Further, from knowing more of Figure 13 and Figure 15, in this embodiment, gain change circuit 91 not during amplifying signal directional coupler (when selecting holding wire 96) make level about 15[dB that descended].Therefore, if, will can not produce special problem with the circuit compensation of front.
Further, in this embodiment, semiconductor switch does not change the holding wire change over switch 94 of circuit 91 outlet sides as gain, but has used directional coupler, so that reduce the insertion loss that holding wire change over switch 94 produces.More particularly, under the situation of semiconductor switch, insert loss and be about 0.6[dB], under the situation of directional coupler, insert loss and be about 0.1[dB].This insertion loss can reduce poor (about 0.5[dB]=10%) of these two values.
In addition, in this embodiment, directional coupler is used as holding wire change over switch 94, and therefore the size of gain change circuit 91 can be dwindled, and the whole dimension of transmitter circuitry 90 also can reduce.Specifically, because the high electrical power of RF signal S3 passes through, the semiconductor switch that provides at the outlet side of amplifier (PA) 98 has big disposal ability.As a result, inner cover (mask) becomes when making it make IC greatly, and is generally 4.0 * 4.0mm in external packing at present.Therefore, under the situation of directional coupler, do not have the influence of the signal level of RF signal S3, and its size is generally 3.2 * 1.6mm.For this reason, directional coupler is used to reduce the size of circuit.
For above-mentioned configuration, finish gain adjustment by the holding wire 95 of changing pure transmission channel and not having the holding wire 96 of amplifier and have an amplifier 98, when holding wire 95 is selected so that amplifier 89 is only just worked.Therefore it is unnecessary resembling traditional amplifier that amplifier constantly works, so that can suppress unnecessary power consumption.
Further, this directional coupler is used as gain and changes the holding wire change over switch 94 that circuit 91 outlet sides provide, and changes the size of circuit 91 and reduces to insert loss so that reduce to gain.
(1-4) the 4th embodiment
In Figure 16, its those parts corresponding to Figure 11 are designated identical label.Label 105 expressions are according to the whole transmitter circuitry of the 4th embodiment.In this embodiment, gain change circuit 106 is used as the gain adjustment that conversion has the holding wire of different gains separately and finishes RF signal S3.
This gain changes circuit and generally comprises holding wire change over switch 107,108; Two holding wires 109,110 with different gains; And the signal line control circuit 111 that is used for control signal wire change over switch 107,108 conversion operations.
Change in gain under the situation of circuit 106, the signal line 110 in two signal line is made of the pure transmission channel that does not have amplifier, and another signal line 109 usefulness amplifiers (PA) 112 constitute the amplification that gains.In addition, the power consumption of the amplifier 112 that provides at holding wire 109 places is optimised according to yield value.
Holding wire change over switch 107 is by having made up two semiconductor switch 107A, and four end switch of 107B constitute.A semiconductor switch 107A changes connection between holding wire 109 and RF drive circuit 92, and another semiconductor switch 107B changes connection between holding wire 110 and RF drive circuit 92.In addition, when holding wire 110 was not connected to RF drive circuit 92, semiconductor switch 107 was connected to resistance R 2 to holding wire 110.
On the other hand, (108A, 108B) directional coupler that constitutes constitutes holding wire change over switch 108, and exports RF signal S3 to transmitting antenna 2 by holding wire 109 or holding wire 110 by the parallel two wires that is similar to the 3rd embodiment.More particularly, in holding wire change over switch 108, holding wire 109 is connected to the end of the first line 108A, and transmitting antenna 2 is connected to the other end, so that be added to transmitting antenna 2 by the RF signal S3 of holding wire 109 through the first line 108A.Holding wire 110 is also connected to the end of the second line 108B, be connected to the other end and have, pick up by the first line 108A so that be coupled between the line of the parallel two wires of the RF signal S3 by holding wire 110 by being added to transmitting antenna 2 with the resistance R 3 of the identical value of characteristic impedance of the second line 108B that is connected to the other end.
Signal line control circuit 111 is given holding wire change over switch 107 according to the desired signal level output of transmitting antenna end control signal S26, with the annexation of control signal wire change over switch 107.More particularly, signal line control circuit 111 is checked the signal level that needs at the transmitting antenna end, to determine RF signal S3 whether amplify by required power.The semiconductor switch 107A of connection signal line change over switch 107 and conversion semiconductor switch 107B were to resistance R 2 sides when signal line control circuit 111 amplified in required power, and the semiconductor switch 107A of cut-off signals line change over switch 107 when required power is not amplified, and conversion semiconductor switch 107 is to RF drive circuit 92 sides.Therefore, power amplification if desired, the RF signal S3 from 92 outputs of RF drive circuit after amplifying through holding wire 109 is added to transmitting antenna 2, and if not required power amplification, this RF signal S3 is added to transmitting antenna 2 through no amplifying signal line 110.Like this, just finished gain adjustment.As a reference, when holding wire 110 as RF signal S3 pass through route when selected, the amplifier 112 of holding wire 109 is turn-offed by signal line control circuit 111.
The signal voltage value that appears on the second line 108B is connected to signal-line choosing circuit 113 with the intersection point that is connected between the resistance R 3 through a diode D1 at the second line 108B of holding wire change over switch 108, so that can be accepted in signal level detection circuit 113.Signal level detection circuit 113 is the circuit that are used to detect the signal level of the RF signal S3 that is provided by transmitting antenna 2, and detects the signal level of RF signal S3 according to the signal voltage value that occurs at the second line 108B.
For example, when RF signal S3 when holding wire 109 is added to transmitting antenna 2, depend on that the signal of RF signal S3 just is coupled out between the line by directional coupler on the present line 108B.Signal level detection circuit 113 is checked these voltage of signals values, so that the signal level of determining to pass through holding wire 109 and being added to the RF signal S3 on the transmitting antenna 2.In addition, the other end of circuit 108B is connected to the resistance R 2 that has with the identical value of characteristic impedance of circuit 108 through semiconductor switch 107B, so that circuit 108B carries out impedance matching.Therefore, circuit 108B can gather the signal of stable state.When transmitting antenna 2 transmit composition in circuit 108B when collected, the resistance R 2 that is connected in circuit 108B is extracted these signal components, and only detects from the level of transmitting antenna 2 radiation signals.
Further, when RF signal S3 adds to transmitting antenna 2 through line 110, because RF signal S3 is by the 108B line, so RF signal S3 appears on the circuit 108B naturally.Signal level detection circuit 113 is checked these voltage of signals values, so that detect by holding wire 110 and add to the signal level of the RF signal S3 of transmitting antenna 2.
By the way, the signal voltage value that appears on the second line 108B is not the signal level that always equals transmitting antenna end RF signal S3, and this is because the coupling loss of directional coupler.But because coupling loss is constant, if skew has given this magnitude of voltage, then signal level detection circuit 113 can be easily and is correctly detected the signal level of RF signal S3.
This signal level detection circuit 113 is also checked the signal level of RF signal S3, to prevent because the self-oscillation of amplifier 112 and the detection of misoperation make transmitted power depart from the value of requirement.Particularly in the cellular system of code division multiple access (CDMA) method, transmitted power is strictly controlled.Therefore, need detect transmitted power by signal level detection circuit 113 is provided.
For aforesaid configuration, in this embodiment, having two signal line 109,110 that gain changes the different gains that circuit 106 provides and being converted with the adjustment that gains.Specifically, the signal level that requires at the transmitting antenna end is examined, and power amplification if desired then selects to have the holding wire 109 of amplifier 112, and if not required power amplify, then select pure transmission channel and do not have the holding wire 110 of amplifier.At this moment, amplifier 112 is only just worked when having selected holding wire 109.Therefore, do not need to resemble and constantly work traditional amplifier, so that suppress unnecessary power consumption.Change the transmitter circuitry 105 that circuit 106 gains and adjusts if use by aforesaid gain, then the life-span of battery of mobile terminal can prolong, and therefore can produce long communication and can utilize the time.
This directional coupler also can be used as the holding wire change over switch 108 that changes circuit 106 outlet sides in gain, so that as the 3rd embodiment, the situation that appears at the comparable use semiconductor switch of insertion loss on the holding wire change over switch 108 reduces.
In addition, change in the circuit 106 in gain, the end of the line 108B of the directional coupler of formation holding wire change over switch 108 is connected to signal level detection circuit 113 through diode D1.Change in the circuit 106 in this gain, holding wire change over switch 107 is converted, and when the line 108A of holding wire 109 and directional coupler provides RF signal S3 to transmitting antenna 2, depends on that the signal of RF signal S3 just appears on the line 108B of directional coupler.When holding wire change over switch 107 is converted, when the line 108B of holding wire 110, directional coupler and line 108A provided RF signal S3 to transmitting antenna 2, RF signal S3 occurred on the online 108B naturally successively.Therefore, the end of line 108B is connected to aforesaid signal level detection circuit 113, so that signal level detection circuit 113 can accept to occur the signal voltage value on the online 108B, and can be detected according to this magnitude of voltage in the signal level of the RF of transmitting antenna end signal S3.
Like this, the line 108 that constitutes the directional coupler of holding wire change over switch 108 is connected to signal level detection circuit 113, so that holding wire change over switch 108 also can be jointly as the signal extracting device that detects RF signal S3 signal level.Therefore, needn't provide other signal extracting device, and the signal level of RF signal S3 can be detected with simple structure.
For aforesaid configuration, this gain adjust by only comprise transmission channel do not have the holding wire 110 of amplifier with the holding wire 109 with amplifier 112 between the conversion realization so that 112 in amplifier is just worked when having selected holding wire 109.Therefore, constantly do not work amplifier does not need to resemble in the past, thereby suppressed unnecessary power consumption.
Further, this directional coupler is used as the holding wire change over switch 108 that outlet side that gain changes circuit 106 provides, so that holding wire 109,110 can be converted with low insertion loss.
In addition, the second line 108B that constitutes the directional coupler of holding wire change over switch 108 is connected to signal level detection circuit 113, so that holding wire change over switch 108 also can be jointly as the signal extracting device that detects RF signal S3 signal level.Therefore, the signal level of RF signal S3 can be detected with simple structure.
(2) receiver circuit
(2-1) the 5th embodiment
The principle of receiver circuit is at first described with reference to Figure 17.Use the adjustment that gains of receiver circuit utilization of the present invention gain modifier 120 as shown in figure 17, suppress unnecessary power consumption simultaneously and avoid because distorted wave reduces receiving sensitivity.
This gain modifier 120 generally comprises the first and second signal-line choosing devices 121,122 that have a plurality of input and output sides separately; Be used for many signal line 123 to 126 that connect, that have different gains between the first and second signal-line choosing devices 121,122; And the holding wire control device 127 that is used to control the selection operation of the first and second signal-line choosing devices 121,122.
At first, the first signal-line choosing device 121 has one or more inputs 128 at least, a plurality of outputs 129 and control end 130, and be configured and can respond the control signal S30 conversion annexation between input 128 and output 129 that is added on control end 130.
Secondary signal line options device 122 has a plurality of inputs 131 again, at least one or a plurality of output 132, with a control end 133, and be configured and respond the control signal S11 conversion annexation between input 131 and output 132 that is added on control end 133.
The output 129 of signal-line choosing device 121 is connected to the input 131 of signal-line choosing device 122 by the holding wire 123 to 126 that has different gains mutually.In this configuration, the signal amplifying apparatus 134 to 137 that has different gains mutually is inserted in respectively in the holding wire 123 to 126, so that each holding wire has different gains.
Control the first and second signal-line choosing devices 121, the holding wire control device 127 of 122 selection operation is according to the definite holding wire (123 to 126) that will select of the signal level that adds to input 128, and export control signal S30 according to the result who determines, S31 removes the selection operation of control signal wire choice device 121,122.
More particularly, in this case, the control procedure that holding wire control device 127 is carried out as shown in figure 18.This control procedure at first starts from step SP40, and at step SP41, an appropriate signals line in control device 127 control signal wire choice devices 121, the 122 signalization lines 123 to 126.Then at step SP42, control device 127 is read the yield value " G " that is had by the holding wire that is provided with from a predetermined storing apparatus.Then at step SP43, control device 127 is measured the output signal level of exporting at output 132 by the holding wire that is provided with " C ".Then at step SP44, control device 127 calculates the level " D " of the input signal that is added on input 128 according to signal level of measuring " C " and yield value " G ".Then at step SP45, control device 127 is selected an appropriate signal line according to the signal level " B " of input signal from holding wire 123 to 126.In other words, for input signal being adjusted to, select an optimal signal line at output 132 desired level.Then, control device is provided with selected holding wire at step SP41, then repeats the processing of front.
Like this, gain modifier 120 to realize the gain adjustment for whole receiver, therefore offers output with constant signal level according to the signal level switching signal line 123 to 126 that is added on input 128.In this case, because signal amplifying apparatus 134 to 137 has fixing yield value, so gain modifier 120 carries out discontinuous gain adjustment.But gain modifier 120 can be kept the optimal power of each signal amplifying apparatus 134 to 137 according to each yield value, and can also turn-off the signal amplifying apparatus that is arranged in the non-selected holding wire, makes it can suppress unnecessary consumption rate consumption like this.
Again because each signal amplifying apparatus 134 to 137 in the gain modifier 120 can be set to have different saturation level mutually, so owing to the saturated receiving sensitivity that reduces can be avoided by suitably changing the holding wire with different saturation levels, even very strong disturbing wave in receiving frequency range, occurs, therefore make it can improve the disturbing wave suppression characteristic.
By the way, in many signal line 123 to 126 at least one or many can substitute with the pure transmission channel that does not have signal amplifying apparatus, perhaps at least in many signal line 123 to 126 one or more in insert an attenuator and replace signal amplifying apparatus.Therefore like this, can produce bigger gain inequality, the saturation level for each unit of disturbing wave level can provide bigger scope, and therefore the disturbing wave suppression characteristic is further improved.Still in this case, because attenuator and transmission channel are parasitic element basically, therefore consumed power not, unnecessary power consumption can be suppressed further.
Here, the receiver circuit that has in fact made up gain modifier 120 is shown among Figure 19, and the part that wherein is same as Fig. 3 has been specified identical label.In receiver circuit 140, gain changes the gain change circuit 120 of circuit 141 corresponding to the front.This gain changes circuit 141 and carries out the gain adjustment of RF band.
This gain changes circuit 141 and generally comprises holding wire change over switch 142,143; The holding wire 144,145 that has different gains by the conversion of holding wire change over switch 142,143; Signal line control circuit 146 with the conversion operations that is used for control signal wire change over switch 142,143.In other words, the signal-line choosing device 121,122 of holding wire change over switch 142,143 response fronts, the holding wire 123,126 of holding wire 144,145 response fronts, and the holding wire control device 127 of signal line control circuit 146 response fronts.
Change in circuit in this gain, the holding wire 144 of one of two signal line is made of the pure transmission channel that does not have amplifier, and another signal line 145 have be used to amplify for example 20[dB of electrical power] an amplifier 147.By the way, optimised by the electric power that the amplifier 147 that is arranged in holding wire 145 consumes according to yield value, and its saturation level is also optimised.
Signal line control circuit 146 output control signal S30, S31 removes switching signal line change over switch 142,143, therefore selects in two signal line 144,145.In this case, signal line control circuit 146 is checked the signal level that needs at the reception antenna end, to determine RF signal S5 whether amplify by required power.When signal line control circuit 146 required powers are amplified, select holding wire 145, when required power is not amplified, select holding wire 144.Like this, power amplification is finished by amplifier 147 when the signal level of RF signal S5 is hanged down, and does not carry out power amplification when signal level is enough high.
In view of this, gain changes circuit 141 switching signal lines (144,145) realization gain adjustment.In this case, gain changes circuit 141 can adopt two kinds of gain-state: a kind of is 0[dB when selecting holding wire 144] state, another kind is the 20[dB when selecting holding wire 145] state.As can be seen, the gain adjustment in the RF level is discontinuous.Therefore, provide the variable gain amplifier 39 that can gain continuously and adjust, so that carry out continuous gain adjustment, with the discontinuous gain adjustment of compensation RF level by variable gain amplifier 39 in the IF of receiver circuit 40 level.In other words, receiver circuit 140 has produced final required gain by two unit; The gain of promptly carrying out discontinuous gain adjustment changes circuit 141 and the variable gain amplifier 39 of the adjustment that gains continuously.
The control procedure of signal line control circuit 146 is described particularly referring now to the flow chart of Figure 20.At first, SP50 begins control procedure in step, and at step SP51, control circuit 146 control signal wire change over switches 142,143 setting signal lines 145 are outside this two signal line, and connection is arranged in the amplifier 147 in the holding wire 145.Then, at step SP52, control circuit 146 yield value " G1 " that read output signal line 145 has from predetermined storage device (particularly the yield value of sense amplifier 147) in this case.Then, at step SP53, control circuit 146 is regulated variable gain amplifier 39, makes the signal level in output 32 outputs reach predetermined value " C ".Then, at step SP54, control circuit 146 is read the yield value " G2 " of the variable gain amplifier 39 of adjusting.Then, at step SP55, control circuit 146 calculates the signal level " D " of the RF signal S5 that receives, the yield value " G1 " of holding wire 145 and the yield value " G2 " of variable gain amplifier 39 according to signal level " C ".Specifically, signal level " D " is that the yield value " G1 " of subtraction signal line 145 from signal level " C " and the yield value " G2 " of variable gain amplifier 39 calculate.
Then, at step SP56, control circuit 146 is read baseline signal level " R ", from predetermined storage device switching signal line.Then, at next procedure SP57, the baseline signal level of reading " R " compares with the signal level " D " of the RF signal S5 of previous calculations.As a result, if the signal level " D " of RF signal S5 is higher, control procedure enters step SP58, and control signal wire change over switch 142,143 setting signal lines 144 and shutoff amplifier 147 be not because require power amplification.Subsequently, control procedure turns back to step SP52 and repeats this processing.On the other hand, if the signal level " D " of RF signal S5 is lower, because require power amplification, so control procedure turns back to step SP51 immediately to repeat this processing.By the way, when holding wire 144 is set, regulate variable gain amplifier 39 once more, the signal level value that needs is provided at output 32 at step SP53.
By this way, signal line control circuit 146 calculates the signal level " D " of RF signal S5 and selects suitable holding wire according to the signal level of calculating " D ", so that RF signal S5 is carried out gain-adjusted, provides the signal level that needs at output 32.
Utilize aforementioned arrangements, be arranged in two signal line 144,145 that have different gains in the gain changeization circuit 141 by conversion and carry out gain-adjusted.Specifically, check the signal level of the RF signal S5 that receives, detect holding wire 145 and whether require power amplification, detect the holding wire 144 that constitutes by the pure transmission channel that does not have amplifier simultaneously and whether do not require power amplification with amplifier 147.In this case, 147 in amplifier is just worked when having selected holding wire 145.Therefore, amplifier was always worked unlike in the past, made it can suppress unnecessary power consumption.Therefore, use acceptor circuit 140, foregoing this circuit changes circuit 141 by gain and regulates gain, and the battery life of portable terminal can prolong, so the standby time can be longer with the available time of communicating by letter.
In addition, change in the circuit 141,, then select the holding wire 144 that constitutes by pure transmission channel, thereby do not carry out power amplification if RF signal S5 has enough signal levels in given gain.Like this, even have strong disturbing wave in the reception frequency range, this disturbing wave can not make amplifier 147 saturated, has therefore avoided owing to saturated inhibition to received signal.By this way, if use gain to change circuit 141, can avoid because the receiving sensitivity that disturbing wave causes reduces.
By the way, because change in gain circuit 141 carries out gain-adjusted by two signal line 144,145 that conversion has different gains, the gain-adjusted that reaches is discontinuous.Therefore, acceptor circuit 140 utilizes the discontinuous change in gain of variable gain amplifier 39 compensation that is arranged in the IF level, so that the as a whole change in gain that needs that provides is provided.By carrying out whole gain-adjusted with gain change circuit 141 and variable gain amplifier 39, the dynamic range of each unit can reduce in acceptor circuit 140.
According to aforesaid configuration, carry out gain-adjusted by conversion by pure transmission channel holding wire that does not have amplifier 147 144 that constitutes and holding wire 145 with amplifier 147, and 147 in amplifier is just worked when holding wire 145 is selected, so this amplifier needn't always be worked as before, therefore make it can suppress unnecessary power consumption.
And, according to aforesaid configuration, because the holding wire 144 that selection is made of pure transmission channel when RF signal S5 has enough signal levels, can prevent because therefore the restriction to received signal that disturbing wave causes makes it can avoid because the reduction of the receiving sensitivity that this disturbing wave causes.
(2-2) the 6th embodiment
Acceptor circuit 149 according to the 6th embodiment is shown in Figure 21, wherein represents with identical label corresponding to the parts among Fig. 4.Though aforementioned first embodiment is described the situation that only changes circuit 141 conversion gains by gain, and this embodiment is by change in gain circuit conversion band pass filter and gain.
Usually, change in gain circuit 150 comprises: holding wire change over switch 151,152 and 153,154; Two signal line 155,156 with different gains; Band pass filter 41,42 and 45 and the signal line control circuit 157 that is used for the conversion operations of control signal wire change over switch 151,152 and 153,154 with different passbands.
Holding wire change over switch 151 comprises a ring-like switch with four switch 151A to 151D formations of ring-like connection, wherein four relative two crosspoints that connect the crosspoint are used as described input, and all the other two crosspoints are used as output, so that can connect an input and an output by single switch.In this case, these two inputs are connected respectively to band pass filter 41,42, and these two outputs are connected respectively to holding wire 155,156.Therefore, the connection between holding wire change over switch 151 conversion bandpass filters 41,42 and the holding wire 155,156.
Equally, holding wire change over switch 152 also comprises a ring-like switch with four switch 152A to 152D formations of ring-like connection, wherein four two relative crosspoints that connect the crosspoint are used as described input, and all the other two crosspoints are used as output, so that can connect an input and an output by single switch.In this case, these two inputs are connected respectively to holding wire 155,156, and these two outputs are connected respectively to band pass filter 45,46.Therefore, the connection between holding wire change over switch 152 switching signal lines 155,156 and the band pass filter 45,46.
Holding wire change over switch 153 is to be used for the switch of transformation applications in the filter of the RF signal S5 that is received by reception antenna 31, and it arrives reception antenna 31 with the connection one of band pass filter 41,42.And holding wire change over switch 154 is to be used for providing a switch that is limited the RF signal S5 of bandwidth by band pass filter 45 or band pass filter 46 to frequency mixer 37, and it is connected to frequency mixer 37 with one of band pass filter 45,46.
And in this embodiment, the holding wire 155 of one of two signal line constitutes a pure transmission channel that does not have amplifier, and another signal line 156 is arranged to the power amplification of for example being carried out 20dB by amplifier 158.By the way, also be in this embodiment, the power consumption that is arranged in the amplifier 158 in the holding wire 156 is optimised according to this yield value, and has optimized its saturation level.
Band pass filter the 41, the 42nd has the filter of different passbands, each other so these two filters have covered the whole bandwidth of RF signal S5.Similarly, band pass filter the 45, the 46th has the filter of different passbands, each other so these two filters have covered the whole bandwidth of RF signal S5.Such division passband is provided, also in acceptor circuit 149, realizes the band pass filter of smaller size smaller and less attenuation.
Signal line control circuit 157 output control signal S40,41 are with switching signal line change over switch 151,152, but also output control signal S42, S43 are with switching signal line change over switch 153,154.In this case, signal line control circuit 157 is checked the signal level of the RF signal S5 that receives so that determine whether RF signal S5 requires power amplification.Signal line control circuit 157 is selected holding wire 156 when requiring power amplification, and selects holding wire 155 when not requiring power amplification.As a reference, when selecting holding wire 155, amplifier 158 is turn-offed by signal line control circuit 157.
And signal line control circuit 157 is checked the employed frequency of RF signal S5, determines select which band pass filter, and according to the line of the switching signal as a result change over switch of determining 151 to 154.
By the way, also be in this embodiment, because gain-adjusted is undertaken by selecting a signal line, the gain-adjusted that obtains in the RF level is discontinuous.For this reason, in acceptor circuit 149, regulate this gain continuously with the discontinuous gain-adjusted of compensation in the RF level at the variable gain amplifier 39 of IF level.
Narrate the control procedure of signal line control circuit 157 here, particularly with reference to flow chart shown in Figure 22.At first, control procedure begins at step SP60, checks the frequency of utilization " F " of the RF signal S5 that receives at step SP61 control circuit 157.Then, at step SP62, control circuit 157 is read the reference frequency " Fc " that is used for the conversion bandpass filter from predetermined storage device.Then, at step SP63, the frequency of utilization " F " of RF signal S5 compares with reference frequency " Fc ".As a result, if the frequency of using is lower, control procedure enters step SP64, if the frequency of using " F " is higher then enter step SP65.
At step SP64, control signal S42 of control circuit 157 outputs arrives band pass filter 41 sides with switching signal line change over switch 153, and output control signal S43 arrives band pass filter 45 sides with switching signal line change over switch 154.In another way, have selected than the band pass filter 41,45 of lower passband.And at step SP64, control circuit 157 output control signal S40 are with the switch 151D of connection signal line change over switch 151 and the output control signal S41 switch 152B with connection signal line change over switch 152.Control circuit 157 is gone back operational amplifier 158 setting signal lines 156.
Then, at step SP66, control circuit 157 yield value " G1 " that read output signal line 156 has from predetermined storage device.Then, at step SP67, control circuit 157 is regulated variable gain amplifier 39, makes the signal level in output 32 outputs reach desired value " C ".Then, at step SP68, control circuit 157 is read the yield value " G2 " of the variable gain amplifier 39 of adjusting.Then, at step SP69, control circuit 157 calculates the signal level " D " of the RF signal S5 that receives, the yield value " G1 " of holding wire 156 and the yield value " G2 " of variable gain amplifier 39 from signal level " C ".Specifically, signal level " D " is to calculate from the yield value " G1 " of signal level " C " subtraction signal line 156 and the yield value " G2 " of variable gain amplifier 39.
Then, at step SP70, control circuit 157 is read baseline signal level " R ", from predetermined storage device switching signal line.Then, at next procedure SP71, the baseline signal level of reading " R " compares with the signal level " D " of the RF signal S5 of previous calculations.As a result, if the signal level " D " of RF signal S5 is higher, owing to do not require power amplification, and control circuit 157 output control signal S40, S41, stopcock 151A, 152A are so that setting signal line 155 and shutoff amplifier 158.Subsequently, control procedure turns back to step SP52 and repeats this processing.On the other hand, if the signal level " D " of RF signal S5 is lower, control procedure turns back to step SP66 to repeat this processing.By the way, when holding wire 144 is set, regulate variable gain amplifier 39 once more, the signal level value that needs is provided at output 32 at step SP53.On the other hand, if the signal level " D " of RF signal S5 is lower, because require power amplification, control procedure turns back to step SP64 immediately to repeat this processing.By the way, when holding wire 155 is set, regulate variable gain amplifier 39 once more, the signal level value that needs is provided at output 32 at step SP67.
On the other hand, at step SP65, control signal S42 of control circuit 157 outputs arrives band pass filter 42 sides with switching signal line change over switch 153, and output control signal S43 arrives band pass filter 46 sides with switching signal line change over switch 154.In another way, it is selected to have a band pass filter 42,46 of upper-passband.And at step SP65, control circuit 157 output control signal S40 are with the switch 151C of connection signal line change over switch 151 and output control signal S41 switch 152C and the operational amplifier 158 setting signal lines 156 with connection signal line change over switch 152.
Then, at step SP73, control circuit 157 yield value " G1 " that read output signal line 156 has from predetermined storage device.Then, at step SP74, control circuit 157 is regulated variable gain amplifier 39, makes the signal level in output 32 outputs reach desired value " C ".Then, at step SP75, control circuit 157 is read the yield value " G2 " of the variable gain amplifier 39 of adjusting.Then, at step SP76, control circuit 157 calculates the signal level " D " of the RF signal S5 that receives, the yield value " G1 " of holding wire 156 and the yield value " G2 " of variable gain amplifier 39 from signal level " C ".Specifically, signal level " D " is to calculate from the yield value " G1 " of signal level " C " subtraction signal line 156 and the yield value " G2 " of variable gain amplifier 39.
Then, at step SP77, control circuit 157 is read baseline signal level " R ", is used for from predetermined storage device switching signal line.Then, at next procedure SP78, the signal level " D " of reading the RF signal S5 of baseline signal level " R " together and previous calculations compares.The result, if the signal level " D " of RF signal S5 is higher, control procedure enters step SP79, owing to do not require power amplification, control circuit 157 output control signal S40, S41, stopcock 151B, 151D are so that setting signal line 155 and shutoff amplifier 158.Subsequently, control procedure turns back to step SP73 and repeats this processing.On the other hand, if the signal level " D " of RF signal S5 is lower, owing to require power amplification, control procedure turns back to step SP65 immediately to repeat this processing, when holding wire 155 is set, regulate variable gain amplifier 39 once more at step SP74, the signal level value that needs is provided at output 32.
As mentioned above, the frequency inverted band pass filter (41,42,45,46) that signal line control circuit 157 is used according to RF signal S5, and select an appropriate signal line that RF signal S5 is carried out gain-adjusted according to the signal level " D " of RF signal S5, therefore provide the signal level that needs at output 32.
Utilize aforementioned arrangements, in this embodiment, band pass filter changes circuit 150 conversions with gain-adjusted by gain.In this case, the state of the holding wire change over switch 151 to 154 in the signal line control circuit 157 control transformation change in gain circuit is so that carry out the conversion of gain-adjusted and band pass filter simultaneously.
By the way, in this embodiment, have one of two holding wires (that is, have the holding wire of band pass filter 41 and have the holding wire of band pass filter 42) of different pass-band performances and have connection between one of two signals 155,156 of different gains by holding wire change over switch 151 conversions that comprise a ring-like switch.
As mentioned above, when this connects by 151 conversions of holding wire change over switch, can reduce the insertion loss that in holding wire change over switch 151, occurs.This is because in ring-like switch, and holding wire is by connecting one of four switch 151A to 151D conversion, so have only a switch to be inserted in this holding wire.Usually, in order to change in one of two circuits of input side and the connection between one of two circuits of outlet side, common situation is to be changed by the combination of two switches.But two switches are inserted in the circuit, produce bigger insertion loss in this case.On the other hand,, when using a ring-like switch, have only a switch to insert in the circuit, can reduce so insert loss as under the situation of present embodiment.
Also be in this embodiment, connection between one of one of two holding wires 155,156 with different gains and two holding wires with different pass-band performances (that is, have the holding wire of band pass filter 45 and have the holding wire of band pass filter 46) is by holding wire change over switch 152 conversions that comprise a ring-like switch.Owing to similar reason, in this part, also can reduce the insertion attenuation.
By the way, also be in this embodiment, because 158 in amplifier is just worked when holding wire 156 is selected, not having the power consumption of doing can be suppressed.And, the holding wire of when RF signal S5 has enough signal levels, selecting pure transmission channel to constitute, even, can prevent that also amplifier 158 is saturated, it can be avoided because the reduction of the receiving sensitivity that disturbing wave causes so in frequency acceptance band, there is disturbing wave.In addition, in this embodiment, because whole gain-adjusted changes circuit 150 by gain and variable gain amplifier 39 carries out, the dynamic range of each unit can reduce.
According to aforesaid configuration, because the holding wire change over switch 151,152 that respectively comprises a ring-like switch is used to the switching signal line, has one of the holding wire of different pass-band performances and have the insertion loss that connection between one of the holding wire 155,156 of different gains can be lower and be converted simultaneously.
(2-3) the 7th embodiment
In Figure 23, number 160 is integrally represented the acceptor circuit according to the 7th embodiment.Under the situation of acceptor circuit 160, change in gain circuit 161 is used to suppress unwanted power consumption and carries out gain-adjusted.
At first, receive by reception antenna 31, have level fluctuation RF signal S5 and be imported into change in gain circuit 161.If RF signal S5 needs to amplify, change in gain circuit 161 allows RF signal S5 by having the holding wire of certain gain value, and if RF signal S5 does not need to amplify, then allow by pure transmission channel.Therefore, regulating gain makes RF signal S5 to the signal level that needs.
Then the RF signal S5 that carries out gain-adjusted by change in gain circuit 161 is imported into RF drive circuit 162, and RF signal S5 stands prearranged signal and handles therein, and is input to frequency mixer 37.RF drive circuit 162 is made up of band pass filter, buffer amplifier etc., when RF signal S5 is added to frequency mixer 37, removes unnecessary frequency component from RF signal S5, and carries out impedance adjustment.
It is the IF signal S7 with low frequency that frequency mixer 37 uses local signal S6 frequency translation RF signal.IF signal S7 is imported into variable gain amplifier 39, is adjusted to the value that needs therein to gaining at last, and outputs to output 32.
Usually, change in gain circuit 161 comprises: holding wire change over switch 163,164; Have different gains, by the holding wire 165,166 of holding wire change over switch 163,164 conversion; Signal line control circuit 167 with the conversion operations that is used for control signal wire change over switch 163,164.
Under the situation of change in gain circuit 161, a signal line 166 of two holding wires is made of the pure transmission channel that does not have amplifier, and another signal line 165 is configured to carry out power amplification by amplifier 168.
Holding wire change over switch 163 is to be made of the directional coupler that comprises parallel two circuits (163A, 163B), and the RF signal S5 that output is received by reception antenna 31 is to holding wire 165,166.More particularly, in holding wire change over switch 163, reception antenna 31 is connected to the end of article one line 163A, and the amplifier 168 of holding wire 165 is connected to the other end, so the RF signal S5 that receives at reception antenna 31 is added to holding wire 165 by article one line 163A.And holding wire 166 is connected to the end of second line 163B.Be connected to the other end and have,, offer holding wire 166 so RF signal S5 is received by the coupling between the circuit of two parallel circuits by second line 163B with the resistance R 10 of the identical value of characteristic impedance of second line 163B.
On the other hand, holding wire change over switch 164 is switches that semiconductor switch constitutes, and it provides RF signal S5 by holding wire 165 or 166 to RF drive circuit 162.
Signal line control circuit 167 output control signal S50 are to holding wire change over switch 164, and therefore the annexation of switching signal line change over switch 164 selects one of two signal line 165,166.More particularly, signal line control circuit 167 is checked in the signal level that antenna end takes place, and determines whether RF signal S5 requires power amplification.When requiring power amplification, signal line control circuit 167 is selected holding wire 165, and selects holding wire 166 when not requiring power amplification.Therefore, when the signal level of RF signal S5 when being low, carry out power amplification by the amplifier 168 of holding wire 165, and when this signal level is enough high, do not carry out power amplification.When selecting holding wire 166, the amplifier 168 of holding wire 165 is turn-offed by signal line control circuit 167.
By the way, also be in this embodiment, owing to, be discontinuous so obtain gain-adjusted in the RF level by selecting two signal line (165,166) to carry out gain-adjusted.For this reason, acceptor circuit 160 is regulated the gain of variable gain amplifier 39 continuously with the discontinuous gain-adjusted of compensation in the RF level in the IF level.
Utilize aforementioned arrangements, change in gain under the situation of circuit 161, gain-adjusted is by the signal level of the RF signal S5 that check to receive and selects to have the holding wire 165 of amplifier 168 when requiring power amplification, and the holding wire 166 of selecting not have the pure transmission channel of amplifier to constitute when requiring power amplification carries out.At this moment, only when having selected holding wire 165 amplifier 168 just work.Like this, this amplifier needn't be worked as before always, makes it can suppress unnecessary power consumption.Therefore, use acceptor circuit 160, change circuit 161 by gain as described above and regulate gain, the battery life of portable terminal be it seems prolongations, thus communicate by letter the available time can be longer.
And, change in the circuit 161 in gain, because when RF signal S5 has enough signal levels, do not select the holding wire 166 of pure transmission channel to carry out the gain amplification, even in frequency acceptance band, there is strong disturbing wave, amplifier 168 can be unsaturated owing to disturbing wave, and can avoid because the saturated inhibition that causes received signal.Therefore, gain change circuit 161 is used to avoid because the reduction of the receiving sensitivity that disturbing wave causes.
And, changing in the circuit 161 in gain, semiconductor switch is not used as holding wire change over switch 163, and is to use a directional coupler, so that reduce the insertion loss that produces at holding wire change over switch 163.More particularly, inserting attenuation under the situation of semiconductor switch is about 0.6dB, is about 0.1dB and insert loss under the situation of directional coupler.The insertion loss can reduce poor (0.5dB about=10%) between these two values.
Utilize above-mentioned configuration, gain-adjusted is not had the holding wire 166 of amplifier and the holding wire 165 with amplifier 168 to carry out by pure transmission channel, so 168 in amplifier is just worked when having selected holding wire 165.Therefore, this amplifier needn't be operated as before consistently, therefore unnecessary power consumption can be suppressed.
And directional coupler is as holding wire change over switch 163, so that the minimizing gain changes the insertion loss in the circuit 161.
(2-4) the 8th embodiment
In Figure 24, corresponding to the identical approximately symbolic representation of the part of Figure 23, label 170 is integrally represented the acceptor circuit according to the 8th embodiment.And in this embodiment, gain changes circuit 171 and is used to change the holding wire that respectively has different gains and carry out the gain-adjusted of RF signal S5.
Usually, gain change circuit 171 comprises: holding wire change over switch 172,173; Two signal line 174,175 with different gains; Signal line control circuit 176 with the operation that is used for control transformation holding wire change over switch 173.
Change in gain under the situation of circuit 171, a signal line 175 of two signal line is made of the pure transmission channel that does not have amplifier, and another signal line 174 is configured to use amplifier (PA) 177 to carry out power amplification.In addition, the power consumption of the amplifier 177 that provides at holding wire 174 is optimized according to this yield value.
Holding wire change over switch 172 is to be made of the directional coupler that comprises parallel two circuits (172A, 172B), is similar to the 7th embodiment, and the RF signal S5 that output is received by reception antenna 31 is to holding wire 174,175.More particularly, in holding wire change over switch 172, reception antenna 31 is connected to the end of article one line 172A, and the amplifier 177 of holding wire 174 is connected to the other end, so the RF signal S5 that is received by reception antenna 31 is added to holding wire 174 by article one line 172A.And, holding wire 175 is connected to the end of second line 172B, be connected to the other end and have,, offer holding wire 175 so RF signal S5 is received by the coupling between the line of two parallel lines by second line 172B with the resistance R 11 of the identical value of characteristic impedance of second line 172B.
On the other hand, holding wire change over switch 173 is made of one four end switch, and two semiconductor switch 173A, 173B are combined therein.Connection between semiconductor switch 173A switching signal line 174 and the RF drive circuit 162, the connection between another semiconductor switch 173B switching signal line 175 and the RF drive circuit 162.In addition, when holding wire 175 was not received RF drive circuit 162, semiconductor switch 173B connected holding wire 175 to resistance R 12.
Signal line control circuit 176 is exported control signal S51 to holding wire change over switch 173, the annexation of control signal wire change over switch 173.More particularly, the signal level that signal line control circuit 176 is checked at reception antenna determines whether RF signal S5 requires power amplification.Signal line control circuit 176 is selected holding wire 174 when requiring power amplification, and selects holding wire 175 when not requiring power amplification.Therefore, carry out power amplification by the amplifier 177 of holding wire 174 at RF signal S5 when being low, and when signal level is enough high, do not carry out power amplification.As a reference, when having selected holding wire 175, the amplifier 177 of holding wire 174 is turn-offed by signal line control circuit 176.
The end of the second line 172B of holding wire change over switch 172 is received signal level sensitive circuit 178 through diode D2, and the voltage of signals value that appears on the second line 172B can receive at signal level detection circuit 178.Signal level detection circuit 178 is the circuit that are used to detect the signal level of the RF signal S5 that receives at reception antenna 31, and according to appearing at the signal level that voltage of signals value on the second line 172B detects RF signal S5.
For example, when RF signal S5 is added to RF drive circuit 162 through holding wire 174 and semiconductor switch 173A, depend between the line of a signal of this RF signal S5 to be coupled out present circuit 172B by directional coupler.Signal level detection circuit 178 is checked this voltage of signals value, so that detect the signal level of the RF signal S5 that receives.In addition, at this moment, the end of circuit 172B is received resistance R 12 through semiconductor switch 173B, and this resistance has the value identical with the characteristic impedance of circuit 172B, so circuit 172B has carried out impedance matching.Therefore, circuit 172B can receive the signal with steady state.
And when RF signal S5 was added to the moving device circuit 162 of R through circuit 175 and semiconductor switch 173B, RF signal S5 was picked by coupling between the line on the circuit 172B, therefore is added to RF drive circuit 162.Therefore, RF signal S5 appears at circuit 172B naturally.Signal level detection circuit 178 is checked this voltage of signals value, so that detect the signal level of the RF signal S5 that receives.
By the way, because the coupling attenuation of this directional coupler, the magnitude of voltage that appears on the second line 172B is not the signal level that always equals at the RF of reception antenna end signal S5.But because this coupling attenuation is constant, if the skew of this magnitude of voltage is given, signal level detection circuit 178 can be easily and is correctly detected the signal level of RF signal S5.
By this way, the information of the signal level of the RF signal S5 that is detected by signal level detection circuit 178 is provided for signal line control circuit 176.Therefore, foregoing, signal line control circuit 176 can be according to the conversion operations of the signal level control signal wire change over switch 173 of RF signal S5.
Utilize aforementioned means, change in the circuit 171 in gain, the signal level of RF signal S5 is examined, if require power amplification, then select to have the holding wire 174 of amplifier 177, if and do not require power amplification, then select not have the holding wire 175 of the pure transmission channel of amplifier, so that carry out gain-adjusted.At this moment, only when having selected holding wire 174 this amplifier just work.Therefore, needn't as routine, operate this amplifier consistently, so that suppress unnecessary power consumption.If use above-mentioned gain to change the acceptor circuit 170 that circuit 171 is carried out gain-adjusted, then the battery life of portable terminal can prolong, and therefore communicating by letter the available time can be longer.
And, change in the circuit 171 in gain, be similar to the 7th embodiment, do not carry out power amplification owing to when the signal level of RF signal S5 is enough, select holding wire 175, even in receiving frequency range, have strong distribution ripple, amplifier 177 can be unsaturated owing to this disturbing wave, so avoided because the inhibition of the saturated received signal that causes.Therefore, use gain circuitry 171 can avoid because the reduction of the receiving sensitivity that disturbing wave causes.
And, change in the circuit 171 in gain, be similar to the 7th embodiment, semiconductor switch is not used as holding wire change over switch 172, and is to use this directional coupler, so that reduce the insertion loss that produces at holding wire change over switch 172.
And, the second line 172B that forms the directional coupler of holding wire change over switch 172 receives signal level sensitive circuit 178 through diode D2, so signal level detection circuit 178 can receive the signal that appears at second line 172B, so that check this magnitude of voltage, and the signal level of RF signal S5 can easily detect.Therefore, change in the circuit 171 in gain, holding wire change over switch 172 also can be used as signal extracting device jointly, and this signal extracting device is used to detect the signal level of RF signal S5.Therefore, needn't provide extra signal extracting device, and the signal level of RF signal S5 can detect with simple structure.
Utilize aforementioned arrangements, gain-adjusted is carried out in the holding wire 175 of the pure transmission channel by there not being amplifier and the conversion that has between the holding wire 174 of amplifier 177, thus only when selecting holding wire 174 amplifier 177 just work.Therefore, this amplifier needn't be operated as before consistently to suppress unnecessary power consumption.
And directional coupler is used as the holding wire change over switch 172 that gain changes the outlet side of circuit 171, so holding wire 174,175 can the conversion of low insertion loss ground.
And the second line 172B that constitutes the directional coupler of holding wire change over switch 172 receives signal level sensitive circuit 178, so holding wire change over switch 172 also can be jointly with the signal extracting device that acts on the signal level that detects RF signal S5.Therefore, the signal level of RF signal S5 detects by simple structure.
(3) other embodiment
The aforesaid first, second, third and the 4th embodiment has narrated amplifier 77,88,98 or 112, and to be used to change the gain and the simple transmission channel of holding wire combined so that change the situation of the gain of holding wire.But, the invention is not restricted to this, and attenuator can be used for changing the gain of holding wire.In this case, because attenuator consumption of electric power not itself,, can produce much bigger effect from suppressing the viewpoint of unnecessary power consumption.
And the aforesaid first, second, third and the 4th embodiment has narrated the situation that change in gain circuit 71,80,91 or 106 is used to the signal in the RF frequency band (being RF signal S3) is carried out gain-adjusted.But, the invention is not restricted to this, gain changes circuit 71,80,91 or 106 and can be used for the signal in the IF frequency band (being IF signal S1) is carried out gain-adjusted.As a reference, consider this combination, two kinds of situations are arranged: a kind of situation, provide change in gain circuit 71,80,91 or 106 in the prime of frequency mixer and back level, the signal of first and second frequencies is carried out gain-adjusted; With a kind of situation, provide gain to change circuit 71,80,91 or 106 in the prime of frequency mixer or arbitrary level of back level, use gain to change circuit 71,80,91 or 106, signal to first frequency carries out gain-adjusted and uses variable gain amplifier that the signal of second frequency is carried out gain-adjusted.
And the aforesaid first, second, third and the 4th embodiment has narrated the situation that the many signal line with different gains are provided simply.But, the invention is not restricted to this, in holding wire, can arrange delay cell, so that the signal delay between the line equalizing signal is poor.By this way, the signal delay difference also can be balanced simultaneously in the change in gain circuit.
And aforementioned second embodiment has narrated and has changed the input side of circuit 80 and outlet side in gain the holding wire with band pass filter and the situation of holding wire change over switch are provided.But, the invention is not restricted to this, can provide holding wire and holding wire change over switch at the input side of change in gain circuit or any side of outlet side with band pass filter.In addition, in this configuration, can constitute by directional coupler, adopt third and fourth embodiment at holding wire change over switch near the place of the outlet side of change in gain circuit.
And aforementioned third and fourth embodiment has narrated directional coupler as near the situation of the holding wire change over switch 94,108 of the outlet side of change in gain circuit 91,106.But the present invention is not only limited to this, and directional coupler can be used as in first and second embodiment the holding wire change over switch 73,84 near the outlet side of change in gain circuit 71,80.Therefore, the insertion loss that produces at holding wire change over switch 73,84 can be reduced, and holding wire change over switch 73,84 can be used in the signal level detection jointly with signal extracting device.
And aforementioned the 5th, the 6th, the 7th and the 8th embodiment has narrated amplifier 147,158,168 or 177 and has been used to change the be combined situation of the gain that is used to change holding wire of the gain of holding wire and simple transmission channel.But the present invention is not limited only to this, and attenuator can be used for changing the gain of holding wire.In this case, because the attenuator of receiving element consumption of electric power not itself,, can produce much bigger effect from suppressing the viewpoint of unnecessary power consumption.
And aforementioned the 5th, the 6th, the 7th and the 8th embodiment has narrated gain and has changed the situation that circuit 141,150,161 or 171 is used to the signal in the RF frequency band (being RF signal S5) is carried out gain-adjusted.But, the present invention is not limited only to this, gain changes circuit 141,150,161 or 171 and is used to the signal in the IF frequency band (being IF signal S7) is carried out gain-adjusted, as a reference, consider this combination, two kinds of situations are arranged: a kind of situation, provide change in gain circuit 141,150,161 or 171 in the prime of frequency mixer and back level, the signal of first and second frequencies is carried out gain-adjusted; With a kind of situation, provide gain to change circuit 141,150,161 or 171 in the prime of frequency mixer or arbitrary level of back level, use gain to change circuit 71,80,91 or 106, signal to first frequency carries out gain-adjusted and uses variable gain amplifier that the signal of second frequency is carried out gain-adjusted.
And aforesaid the 5th, the 6th, the 7th and the 8th embodiment has narrated the situation that the many signal line with different gains are provided simply.But, the invention is not restricted to this, in holding wire, can arrange delay cell, so that the signal delay between the line equalizing signal is poor.By this way, the signal delay difference also can be balanced simultaneously in the change in gain circuit.
And aforementioned the 6th embodiment has narrated and has changed the input side of circuit 150 and outlet side in gain the holding wire with band pass filter and the situation of holding wire change over switch are provided.But the present invention is not limited only to this, can provide holding wire and the holding wire change over switch with band pass filter at the input side of gain change circuit or the either side of outlet side.In addition, in this configuration, but constitute, adopt the 7th and eight embodiment at holding wire change over switch directional coupler near the place of the outlet side of change in gain circuit.
And the aforementioned the 7th and the 8th embodiment has narrated the situation of directional coupler as the holding wire change over switch 163,172 of the outlet side that changes circuit 161,171 in the most approaching gain.But the present invention is not only limited to this, and directional coupler can be used as in the 5th and the 6th embodiment the holding wire change over switch 142,153 near the outlet side of change in gain circuit 141,150.Therefore, the insertion loss that produces at holding wire change over switch 142,153 can be reduced, and holding wire change over switch 142,153 can be used in the signal level detection jointly with signal extracting device.
According to aforesaid the present invention, from many signal line, select an appropriate signal line by signal amplifying apparatus with different gains, the transmission signals that is added to input is carried out gain-adjusted.Therefore, the power consumption of each signal amplifying apparatus is optimised according to this yield value, and the operation of the signal amplifying apparatus on not selecteed holding wire can be stopped, so that suppress unnecessary power consumption.
And, according to the present invention, from many signal line, select an appropriate signal line with different gains by signal amplifying apparatus, the received signal that is added to input is carried out gain-adjusted.Therefore, the power consumption of each signal amplifying apparatus can be optimized according to this yield value, and the operation of the signal amplifying apparatus on not selecteed holding wire can be stopped, so that suppress unnecessary power consumption.And, owing to when the signal of this reception has enough signal levels, select to have the signal path of low gain, even in frequency acceptance band, there is strong disturbing wave, can avoid in advance because the signal amplifying apparatus that causes of this disturbing wave saturated, with the signal of avoiding suppressing to receive, it can be avoided because the reduction of the receiving sensitivity that this disturbing wave causes.
Though narrated in conjunction with the preferred embodiments of the present invention, be conspicuous for those skilled in the art: the purpose of various changes and modification is to cover all changes and the modification that falls in true spirit of the present invention and the scope at appending claims.
Claims (30)
1. a receiving equipment comprises the gain modifier that is used for regulating gain of received signal, and wherein, described gain modifier comprises:
A kind of directional coupler is made up of first and second parallel circuits, and comprises at least one input and a plurality of output, is used to change the annexation between described at least one input and the described a plurality of output;
The signal-line choosing device comprises a plurality of inputs, at least one output and a control end, is used to change the annexation between described a plurality of input and described at least one output;
Many signal line, one by one connect the described a plurality of inputs of described a plurality of outputs of described directional coupler to described signal-line choosing device, the gain that differs from one another that provides by signal amplifying apparatus is provided these many signal line, wherein these many signal line one of them is the transmission channel that does not have signal amplifying apparatus at least; And
The holding wire control device, the conversion that is controlled in the signal-line choosing device by the control end that control signal is added to the signal-line choosing device connects;
Described holding wire control device is selected an optimum signal line from described many signal line, the received signal of described at least one input of offering directional coupler is carried out gain-adjusted.
2. according to the receiving equipment of claim 1, it is characterized in that:
At least one holding wire is the transmission channel that does not have signal amplifying apparatus in described many signal line.
3. according to the receiving equipment of claim 2, it is characterized in that:
Every traditional thread binding delay cell fully of described many signal line, the signal delay that is used between the equalizing signal circuit is poor.
4. according to the receiving equipment of claim 2, it is characterized in that also comprising being used for the frequency mixer of conversion received signal frequency, wherein,
When the signal of described reception has the first frequency signal, utilize the gain to received signal of described gain modifier regulate and
When being transformed to the second frequency signal by frequency mixer, received signal utilize predetermined variable gain amplifier gain to received signal to regulate.
5. according to the receiving equipment of claim 2, it is characterized in that also comprising being used for the frequency mixer of conversion received signal frequency, wherein,
When the signal of described reception utilizes frequency mixer to carry out frequency translation, the first gain modifier is arranged at the one-level before the described frequency mixer, the second gain modifier is arranged at the one-level after the described frequency mixer, so that respectively the received signal of first frequency and the received signal of second frequency are carried out gain-adjusted.
6. according to the receiving equipment of claim 2, it is characterized in that also comprising being used for the frequency mixer of conversion received signal frequency, wherein,
When the signal of described reception utilizes frequency mixer to carry out frequency translation, the first gain modifier is arranged at the one-level before the described frequency mixer, the second gain modifier then is arranged at the one-level after the described frequency mixer, so that respectively the received signal of first frequency and the received signal of second frequency are carried out gain-adjusted;
At least one holding wire in many signal line of the second gain modifier is one to have and is used for the received signal of second frequency is carried out the holding wire of the attenuator of gain-adjusted.
7. according to the receiving equipment of claim 1, it is characterized in that: at least one holding wire in many signal line is a holding wire with the attenuator that is used for changing this holding wire gain.
8. according to the receiving equipment of claim 7, it is characterized in that:
Delay cell of every signal line equipment of described many signal line, the signal delay that is used between the line equalizing signal is poor.
9. according to the receiving equipment of claim 2, it is characterized in that also comprising being used for the frequency mixer of conversion received signal frequency, wherein,
When the signal of described reception has the first frequency signal, utilize, the gain to received signal of described gain modifier regulate and
When received signal is transformed to the second frequency signal by frequency mixer, utilize predetermined variable gain amplifier gain to received signal to regulate.
10. according to the receiving equipment of claim 7, it is characterized in that also comprising being used for the frequency mixer of conversion received signal frequency, wherein,
When the signal of described reception utilizes frequency mixer to carry out frequency translation, the first gain modifier is arranged at the one-level before the described frequency mixer, the second gain modifier then is arranged at the one-level after the described frequency mixer, so that respectively the received signal of first frequency and the received signal of second frequency are carried out gain-adjusted.
11. the receiving equipment according to claim 1 is characterized in that:
Delay cell of every signal line equipment of described many signal line, the signal delay that is used between the equalizing signal circuit is poor.
12. according to the receiving equipment of claim 1, it is characterized in that also comprising being used for the frequency mixer of conversion received signal frequency, wherein,
When the signal of described reception has the first frequency signal, utilize the gain to received signal of described gain modifier regulate and
When received signal is transformed to the second frequency signal by frequency mixer, utilize predetermined variable gain amplifier gain to received signal to regulate.
13. receiving equipment according to claim 1, it is characterized in that also comprising and be used for the frequency mixer of conversion received signal frequency, wherein, when the signal of described reception utilizes frequency mixer to carry out frequency translation, the one-level and the second gain modifier that the first gain modifier is arranged at before the described frequency mixer are arranged at described frequency mixer one-level afterwards, so that respectively the received signal of first frequency and the received signal of second frequency are carried out gain-adjusted.
14. according to the receiving equipment of claim 1, it is characterized in that also comprising being used for the frequency mixer of conversion received signal frequency, wherein,
When the signal of described reception utilizes frequency mixer to carry out frequency translation, the one-level and the second gain modifier that the first gain modifier is arranged at before the described frequency mixer are arranged at described frequency mixer one-level afterwards, so that respectively the received signal of first frequency and the received signal of second frequency are carried out gain-adjusted; And
At least one holding wire is the transmission channel that does not have signal amplifying apparatus in described many signal line of the described second gain modifier.
15. according to the receiving equipment of claim 1, it is characterized in that also comprising being used for the frequency mixer of conversion received signal frequency, wherein,
When the signal of described reception utilizes frequency mixer to carry out frequency translation, the first gain modifier is arranged at one-level before the described frequency mixer and the second gain modifier and is arranged at one-level after the described frequency mixer, so that carry out gain-adjusted to the received signal that belongs to first frequency with to the received signal that belongs to second frequency respectively; And
At least one holding wire in many signal line of the described second gain modifier is one to have and is used for the received signal of second frequency is carried out the holding wire of the attenuator of gain-adjusted.
16. a receiving equipment that comprises the modifier that gains uses described gain modifier to regulate the gain of received signal, wherein said gain modifier comprises:
The first signal-line choosing device comprises a plurality of inputs, a plurality of output and a control end, is used to change the annexation between described a plurality of input and the described a plurality of output;
Secondary signal line options device comprises a plurality of inputs, at least one output and a control end, is used to change the annexation between described input and the described output;
A directional coupler is made up of first and second parallel circuits, and comprises at least one input and a plurality of output, is used to change the annexation between described at least one input and the described a plurality of output;
Many first holding wires one by one connect the described a plurality of inputs of described a plurality of outputs of the described first signal-line choosing device to described secondary signal line options device, and described many first holding wires have different gains each other by signal amplifying apparatus;
Many secondary signal lines one by one connect the described a plurality of inputs of described a plurality of outputs of described directional coupler to the described first signal-line choosing device, and described many secondary signal lines have different pass-band performances each other by filter; And
The holding wire control device, be controlled at described first signal-line choosing device and secondary signal line options device conversion annexation separately by the described control end that control signal is added to respectively described first signal-line choosing device and secondary signal line options device, wherein
Described holding wire control device is selected an optimum signal line from described many first holding wires and many secondary signal lines, the signal that receives is carried out gain-adjusted and conversion passband, and this signal is provided for described at least one input of described the 3rd signal-line choosing device.
17. the receiving equipment according to claim 16 is characterized in that:
At least one holding wire is the transmission channel that does not have signal amplifying apparatus in described many first holding wires.
18. the receiving equipment according to claim 16 is characterized in that: at least one holding wire in many first holding wires is a holding wire with the attenuator that is used for changing this holding wire gain.
19. receiving equipment according to claim 16, it is characterized in that: the first signal-line choosing device comprises a ring-like switch that is made of four switches of ring-like connection, two inputs and two outputs are wherein arranged, thereby relative two switches in four switches are designated as a plurality of inputs of the described first signal-line choosing device, and all the other two switches in four switches are designated as a plurality of outputs of the first signal-line choosing device.
20. the receiving equipment according to claim 16 is characterized in that:
Delay element is provided in many first holding wires and the many secondary signal lines, and the signal delay that is used between the line equalizing signal is poor.
21. a receiving equipment that comprises the modifier that gains uses described gain modifier to regulate the gain of received signal, wherein said gain modifier comprises:
A directional couple is made up of first and second parallel circuits, and comprises at least one input and a plurality of output, is used to change the annexation between described at least one input and the described a plurality of output;
The first signal-line choosing device comprises a plurality of inputs, a plurality of output and a control end, is used to change the annexation between described a plurality of input and the described a plurality of output;
Secondary signal line options device comprises a plurality of inputs, at least one output and a control end, is used to change the annexation between described a plurality of input and described at least one output;
Many first holding wires one by one connect the described a plurality of inputs of described a plurality of outputs of described directional coupler to the described first signal-line choosing device, and described many first holding wires have different gains each other by signal amplifying apparatus;
Many secondary signal lines one by one connect the described a plurality of inputs of described a plurality of outputs of the described first signal-line choosing device to described secondary signal line options device, and described many secondary signal lines have different pass-band performances each other by filter; And
The holding wire control device, control described first signal-line choosing device and secondary signal line options device conversion annexation separately by the described control end that control signal is added to respectively described first signal-line choosing device and secondary signal line options device, wherein
Described holding wire control device is selected an optimum signal line from described many first holding wires and many secondary signal lines, the signal that receives is carried out gain-adjusted and conversion passband, and this signal is provided for described at least one input of described the firstth signal-line choosing device.
22. the receiving equipment according to claim 21 is characterized in that:
At least one holding wire is the transmission channel that does not have signal amplifying apparatus in described many first holding wires.
23. the receiving equipment according to claim 21 is characterized in that: at least one holding wire in many first holding wires is a holding wire with the attenuator that is used for changing this holding wire gain.
24. receiving equipment according to claim 21, it is characterized in that: the first signal-line choosing device comprises a ring-like switch that is made of four switches of ring-like connection, two inputs and two outputs are wherein arranged, thereby relative two switches in four switches are designated as a plurality of inputs of the described first signal-line choosing device, and all the other two switches in four switches are designated as a plurality of outputs in the first signal-line choosing device.
25. the receiving equipment according to claim 21 is characterized in that:
Delay element is provided in many first holding wires and the many secondary signal lines, and the signal delay that is used between the equalizing signal circuit is poor.
26. a receiving equipment that comprises the modifier that gains uses described gain modifier to regulate the gain of received signal, wherein said gain modifier comprises:
The first signal-line choosing device comprises a plurality of inputs, a plurality of output and a control end, is used to change the annexation between described a plurality of input and the described a plurality of output;
Secondary signal line options device comprises a plurality of inputs, a plurality of output and a control end, is used to change the annexation between described a plurality of input and the described a plurality of output;
A directional coupler is made up of first and second parallel circuits, and comprises at least one input and a plurality of output, is used to change the annexation between described at least one input and the described a plurality of output;
The 3rd signal-line choosing device comprises a plurality of inputs, at least one output and a control end, is used to change the annexation between described a plurality of input and described at least one output;
Many first holding wires, one by one connect the described a plurality of inputs of described a plurality of outputs of the described first signal-line choosing device, have different gains each other by signal amplifying apparatus with described many first holding wires to described secondary signal line options device;
Many secondary signal lines one by one connect the described a plurality of inputs of described a plurality of outputs of described directional coupler to the described first signal-line choosing device, have different pass-band performances with described many secondary signal lines each other by first filter;
Many articles the 3rd holding wires one by one connect the described of described secondary signal line options device
Many articles the 3rd holding wires, one by one connect the described a plurality of inputs of described a plurality of outputs of described secondary signal line options device, have different pass-band performances each other by second filter with described many articles the 3rd holding wires to described the 3rd signal-line choosing device; And
The holding wire control device, be controlled at the conversion annexation of each device in the described first signal-line choosing device, secondary signal line options device and the 3rd signal-line choosing device by the described control end that control signal is added to the described first signal-line choosing device, secondary signal line options device and the 3rd signal-line choosing device, wherein
Described holding wire control device is selected an optimum signal line in the middle of described many first holding wires, many secondary signal lines and many articles the 3rd holding wires, the signal that receives is carried out gain-adjusted and conversion passband, and this signal is provided for described at least one input of described directional coupler.
27. the receiving equipment according to claim 26 is characterized in that:
At least one holding wire is the transmission channel that does not have signal amplifying apparatus in described many first holding wires.
28. the receiving equipment according to claim 26 is characterized in that: at least one holding wire in many first holding wires is a holding wire with the attenuator that is used for changing described at least one holding wire gain.
29. receiving equipment according to claim 26, it is characterized in that: the first signal-line choosing device comprises a ring-like switch that is made of ring-like four switches that are connected separately with secondary signal line options device, two inputs and two outputs are wherein arranged, thereby relative two switches in four switches are designated as a plurality of inputs, and all the other two switches in four switches are designated as a plurality of outputs.
30. the receiving equipment according to claim 26 is characterized in that:
Delay element is provided in many first holding wires, many secondary signal lines and many articles the 3rd holding wires, and the signal delay that is used between the equalizing signal circuit is poor.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24869795 | 1995-08-31 | ||
| JP24869895 | 1995-08-31 | ||
| JP248697/95 | 1995-08-31 | ||
| JP248698/95 | 1995-08-31 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96122711A Division CN1120578C (en) | 1995-08-31 | 1996-08-31 | Transmitting apparatus and method of adjusting gain of signal to be transmitted, and receiving apparatus and method of adjusting gain of received signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1389986A true CN1389986A (en) | 2003-01-08 |
| CN100391109C CN100391109C (en) | 2008-05-28 |
Family
ID=26538907
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96122711A Expired - Fee Related CN1120578C (en) | 1995-08-31 | 1996-08-31 | Transmitting apparatus and method of adjusting gain of signal to be transmitted, and receiving apparatus and method of adjusting gain of received signal |
| CNB011451890A Expired - Fee Related CN100391109C (en) | 1995-08-31 | 1996-08-31 | Transmitting/receiving apparatus of regulating gain of transmitting/receiving signal, and method thereof |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96122711A Expired - Fee Related CN1120578C (en) | 1995-08-31 | 1996-08-31 | Transmitting apparatus and method of adjusting gain of signal to be transmitted, and receiving apparatus and method of adjusting gain of received signal |
Country Status (4)
| Country | Link |
|---|---|
| US (2) | US5862461A (en) |
| EP (1) | EP0762638A3 (en) |
| KR (1) | KR100400970B1 (en) |
| CN (2) | CN1120578C (en) |
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-
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- 1996-08-30 KR KR1019960037181A patent/KR100400970B1/en not_active IP Right Cessation
- 1996-08-30 EP EP96306293A patent/EP0762638A3/en not_active Withdrawn
- 1996-08-31 CN CN96122711A patent/CN1120578C/en not_active Expired - Fee Related
- 1996-08-31 CN CNB011451890A patent/CN100391109C/en not_active Expired - Fee Related
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1998
- 1998-08-31 US US09/143,823 patent/US6070063A/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701420A (en) * | 2013-11-27 | 2014-04-02 | 广州润芯信息技术有限公司 | Transmitter gain distribution method and circuit |
| CN103701420B (en) * | 2013-11-27 | 2016-07-06 | 广州润芯信息技术有限公司 | A kind of transmitter gain distribution method and circuit |
| TWI748231B (en) * | 2019-08-21 | 2021-12-01 | 崛智科技有限公司 | Receiver circuit and operation method |
| CN111162809A (en) * | 2019-12-13 | 2020-05-15 | 西安易朴通讯技术有限公司 | Wireless receiver and wireless device |
| CN111162809B (en) * | 2019-12-13 | 2022-04-15 | 西安易朴通讯技术有限公司 | Wireless receiver and wireless device |
Also Published As
| Publication number | Publication date |
|---|---|
| US5862461A (en) | 1999-01-19 |
| EP0762638A3 (en) | 1998-11-18 |
| KR100400970B1 (en) | 2004-03-09 |
| EP0762638A2 (en) | 1997-03-12 |
| CN100391109C (en) | 2008-05-28 |
| KR970013825A (en) | 1997-03-29 |
| CN1153430A (en) | 1997-07-02 |
| US6070063A (en) | 2000-05-30 |
| CN1120578C (en) | 2003-09-03 |
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